<s>
The	O
history	B-Protocol
of	I-Protocol
Microsoft	I-Protocol
Exchange	I-Protocol
Server	I-Protocol
begins	O
with	O
the	O
first	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
Server	I-Operating_System
product	O
-	O
Exchange	B-Operating_System
Server	I-Operating_System
4.0	O
in	O
April	O
1996	O
-	O
and	O
extends	O
to	O
the	O
current	O
day	O
.	O
</s>
<s>
Microsoft	B-Application
Mail	I-Application
v2.0	O
(	O
written	O
by	O
Microsoft	O
)	O
was	O
replaced	O
in	O
1991	O
by	O
"	O
Microsoft	B-Application
Mail	I-Application
for	O
PC	O
Networks	O
v2.1	O
"	O
,	O
based	O
on	O
Network	O
Courier	O
,	O
which	O
Microsoft	O
had	O
acquired	O
.	O
</s>
<s>
When	O
the	O
original	O
version	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
was	O
sold	O
to	O
the	O
public	O
,	O
it	O
was	O
positioned	O
as	O
an	O
upgrade	O
to	O
Microsoft	B-Application
Mail	I-Application
3.5	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
was	O
an	O
entirely	O
new	O
X.400-based	O
client	B-Operating_System
–	I-Operating_System
server	I-Operating_System
mail	O
system	O
with	O
a	O
single	O
database	O
store	O
that	O
also	O
supported	O
X.500	B-Protocol
directory	I-Protocol
services	O
.	O
</s>
<s>
During	O
its	O
development	O
,	O
Microsoft	O
migrated	O
their	O
own	O
internal	O
email	O
from	O
a	O
XENIX-based	O
system	O
to	O
Exchange	B-Operating_System
Server	I-Operating_System
from	O
April	O
1993	O
,	O
with	O
all	O
32,000	O
Microsoft	O
mailboxes	O
on	O
Exchange	O
by	O
late	O
1996	O
.	O
</s>
<s>
The	O
directory	O
used	O
by	O
Exchange	B-Operating_System
Server	I-Operating_System
eventually	O
became	O
Microsoft	O
's	O
Active	B-Protocol
Directory	I-Protocol
service	I-Protocol
,	O
an	O
LDAP-compliant	O
directory	O
service	O
.	O
</s>
<s>
Active	B-Protocol
Directory	I-Protocol
was	O
integrated	O
into	O
Windows	B-Application
2000	I-Application
as	O
the	O
foundation	O
of	O
Windows	B-General_Concept
Server	I-General_Concept
domains	I-General_Concept
.	O
</s>
<s>
The	O
first	O
release	O
of	O
Exchange	O
outside	O
of	O
Microsoft	O
was	O
Exchange	B-Operating_System
Server	I-Operating_System
4.0	O
in	O
April	O
1996	O
,	O
with	O
five	O
service	O
packs	O
being	O
released	O
over	O
the	O
next	O
two	O
years	O
.	O
</s>
<s>
Introduced	O
the	O
new	O
Exchange	O
Administrator	O
console	O
,	O
as	O
well	O
as	O
opening	O
up	O
"	O
integrated	O
"	O
access	O
to	O
SMTP-based	O
networks	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
Unlike	O
Microsoft	B-Application
Mail	I-Application
(	O
which	O
required	O
a	O
standalone	O
SMTP	B-Protocol
relay	O
)	O
,	O
Exchange	B-Operating_System
Server	I-Operating_System
5.0	O
could	O
,	O
with	O
the	O
help	O
of	O
an	O
add-in	O
called	O
the	O
Internet	O
Mail	O
Connector	O
,	O
communicate	O
directly	O
with	O
servers	O
using	O
SMTP	B-Protocol
.	O
</s>
<s>
Version	O
5.0	O
also	O
introduced	O
a	O
new	O
Web-based	B-Protocol
e-mail	I-Protocol
interface	O
called	O
Exchange	O
Web	O
Access	O
,	O
which	O
was	O
rebranded	O
as	O
Outlook	B-Protocol
Web	I-Protocol
Access	I-Protocol
in	O
a	O
later	O
service	O
pack	O
.	O
</s>
<s>
Along	O
with	O
Exchange	B-Operating_System
Server	I-Operating_System
version	O
5.0	O
,	O
Microsoft	O
released	O
version	O
8.01	O
of	O
Microsoft	B-Application
Outlook	I-Application
,	O
version	O
5.0	O
of	O
the	O
Microsoft	B-Application
Exchange	I-Application
Client	I-Application
and	O
version	O
7.5	O
of	O
Microsoft	B-Application
Schedule+	I-Application
to	O
support	O
the	O
new	O
features	O
in	O
the	O
new	O
version	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
5.0	O
introduced	O
a	O
number	O
of	O
other	O
new	O
features	O
including	O
a	O
new	O
version	O
of	O
Outlook	B-Protocol
Web	I-Protocol
Access	I-Protocol
with	O
calendar	O
support	O
,	O
support	O
for	O
IMAP4	B-Protocol
and	O
LDAP	B-Protocol
v3	O
clients	O
and	O
the	O
Deleted	O
Item	O
Recovery	O
feature	O
.	O
</s>
<s>
The	O
last	O
version	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
to	O
have	O
a	O
separate	O
directory	O
,	O
SMTP	B-Protocol
and	O
NNTP	O
services	O
.	O
</s>
<s>
There	O
was	O
no	O
new	O
version	O
of	O
Exchange	O
Client	O
and	O
Schedule+	B-Application
for	O
version	O
5.5	O
,	O
instead	O
version	O
8.03	O
of	O
Microsoft	B-Application
Outlook	I-Application
was	O
released	O
to	O
support	O
the	O
new	O
features	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
5.5	O
.	O
</s>
<s>
They	O
differ	O
in	O
database	O
store	O
size	O
,	O
mail	O
transport	O
connectors	O
,	O
and	O
clustering	B-Operating_System
capabilities	O
.	O
</s>
<s>
Standard	O
Edition	O
Had	O
the	O
same	O
16GB	O
database	O
size	O
limitation	O
as	O
earlier	O
versions	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
It	O
included	O
the	O
Site	O
Connector	O
,	O
MS	B-Application
Mail	I-Application
Connector	O
,	O
Internet	O
Mail	O
Service	O
(	O
previously	O
"	O
Internet	O
Mail	O
Connector	O
"	O
)	O
,	O
and	O
Internet	O
News	O
Service	O
(	O
previously	O
"	O
Internet	O
News	O
Connector	O
"	O
)	O
,	O
as	O
well	O
as	O
software	O
to	O
interoperate	O
with	O
cc:Mail	B-Application
,	O
Lotus	B-Operating_System
Notes	I-Operating_System
and	O
Novell	B-Operating_System
GroupWise	I-Operating_System
.	O
</s>
<s>
Adds	O
an	O
X.400	B-Protocol
connector	O
,	O
and	O
interoperability	O
software	O
with	O
SNADS	B-Architecture
and	O
PROFS	B-Application
.	O
</s>
<s>
Introduced	O
two	O
node	O
clustering	B-Operating_System
capability	O
.	O
</s>
<s>
However	O
,	O
many	O
customers	O
were	O
deterred	O
from	O
upgrading	O
by	O
the	O
requirement	O
for	O
a	O
full	O
Microsoft	B-Protocol
Active	I-Protocol
Directory	I-Protocol
infrastructure	O
to	O
be	O
in	O
place	O
,	O
as	O
unlike	O
Exchange	B-Operating_System
Server	I-Operating_System
5.5	O
,	O
Exchange	O
2000	O
Server	O
had	O
no	O
built-in	O
Directory	O
Service	O
,	O
and	O
had	O
a	O
dependency	O
upon	O
Active	B-Protocol
Directory	I-Protocol
.	O
</s>
<s>
The	O
migration	O
process	O
from	O
Exchange	B-Operating_System
Server	I-Operating_System
5.5	O
necessitated	O
having	O
the	O
two	O
systems	O
online	O
at	O
the	O
same	O
time	O
,	O
with	O
user-to-mailbox	O
mapping	O
and	O
a	O
temporary	O
translation	O
process	O
between	O
the	O
two	O
directories	O
.	O
</s>
<s>
Exchange	O
2000	O
Server	O
also	O
added	O
support	O
for	O
instant	B-Application
messaging	I-Application
,	O
but	O
that	O
capability	O
was	O
later	O
spun	O
off	O
to	O
Microsoft	B-Protocol
Office	I-Protocol
Live	I-Protocol
Communications	I-Protocol
Server	I-Protocol
.	O
</s>
<s>
Codenamed	O
"	O
Titanium	O
"	O
,	O
this	O
version	O
can	O
be	O
run	O
on	O
Windows	B-Application
2000	I-Application
Server	O
(	O
with	O
Service	O
Pack	O
4	O
)	O
and	O
32-bit	O
Windows	B-Application
Server	I-Application
2003	I-Application
,	O
although	O
some	O
new	O
features	O
only	O
work	O
with	O
the	O
latter	O
.	O
</s>
<s>
Like	O
Windows	B-Application
Server	I-Application
2003	I-Application
,	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
has	O
many	O
compatibility	O
modes	O
to	O
allow	O
users	O
to	O
slowly	O
migrate	O
to	O
the	O
new	O
system	O
.	O
</s>
<s>
This	O
is	O
useful	O
in	O
large	O
companies	O
with	O
distributed	O
Exchange	B-Operating_System
Server	I-Operating_System
environments	O
who	O
cannot	O
afford	O
the	O
downtime	O
and	O
expense	O
that	O
comes	O
with	O
a	O
complete	O
migration	O
.	O
</s>
<s>
It	O
made	O
the	O
migration	O
from	O
pre-2000	O
versions	O
of	O
Exchange	O
significantly	O
easier	O
(	O
although	O
still	O
involved	O
the	O
same	O
basic	O
steps	O
)	O
,	O
and	O
many	O
users	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
5.5	O
waited	O
for	O
the	O
release	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
to	O
upgrade	O
.	O
</s>
<s>
The	O
upgrade	O
process	O
also	O
required	O
upgrading	O
a	O
company	O
's	O
servers	O
to	O
Windows	B-Application
2000	I-Application
.	O
</s>
<s>
Some	O
customers	O
opted	O
to	O
stay	O
on	O
a	O
combination	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
5.5	O
and	O
Windows	B-Device
NT	I-Device
4.0	I-Device
,	O
both	O
of	O
which	O
are	O
no	O
longer	O
supported	O
by	O
Microsoft	O
.	O
</s>
<s>
One	O
of	O
the	O
new	O
features	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
is	O
enhanced	O
disaster	O
recovery	O
,	O
which	O
allows	O
administrators	O
to	O
bring	O
the	O
server	O
online	O
more	O
quickly	O
.	O
</s>
<s>
Some	O
features	O
previously	O
available	O
in	O
the	O
Microsoft	O
Mobile	O
Information	O
Server	O
2001/2002	O
products	O
have	O
been	O
added	O
to	O
the	O
core	O
Exchange	B-Operating_System
Server	I-Operating_System
product	O
,	O
like	O
Outlook	B-Application
Mobile	I-Application
Access	O
and	O
server-side	O
Exchange	B-Protocol
ActiveSync	I-Protocol
,	O
while	O
the	O
Mobile	O
Information	O
Server	O
product	O
itself	O
has	O
been	O
dropped	O
.	O
</s>
<s>
Others	O
,	O
such	O
as	O
Instant	B-Application
Messaging	I-Application
and	O
Exchange	O
Conferencing	O
Server	O
have	O
been	O
extracted	O
completely	O
in	O
order	O
to	O
form	O
separate	O
products	O
.	O
</s>
<s>
Microsoft	O
now	O
appears	O
to	O
be	O
positioning	O
a	O
combination	O
of	O
Microsoft	B-Application
Office	I-Application
,	O
Microsoft	B-Protocol
Office	I-Protocol
Live	I-Protocol
Communications	I-Protocol
Server	I-Protocol
,	O
Live	B-Protocol
Meeting	I-Protocol
,	O
and	O
SharePoint	B-Protocol
as	O
its	O
collaboration	O
software	O
of	O
choice	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
is	O
now	O
to	O
be	O
simply	O
e-mail	O
and	O
calendaring	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
added	O
several	O
basic	O
filtering	O
methods	O
to	O
Exchange	B-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2000	O
supported	O
the	O
ability	O
to	O
block	O
a	O
sender	O
's	O
address	O
,	O
or	O
e-mail	O
domain	O
by	O
adding	O
'	O
*	O
@domain	O
.com	O
'	O
,	O
which	O
is	O
still	O
supported	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
.	O
</s>
<s>
Added	O
filtering	O
methods	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
are	O
:	O
</s>
<s>
Intelligent	O
Message	O
Filter	O
:	O
Initially	O
a	O
free	O
Microsoft	O
add-on	O
,	O
later	O
,	O
part	O
of	O
service	O
pack	O
2	O
,	O
that	O
uses	O
heuristic	O
message	O
analysis	O
to	O
block	O
messages	O
or	O
direct	O
them	O
to	O
the	O
"	O
Junk	O
E-Mail	O
"	O
folder	O
in	O
Microsoft	B-Application
Outlook	I-Application
clients	O
.	O
</s>
<s>
Beginning	O
with	O
the	O
release	O
of	O
Service	O
Pack	O
2	O
,	O
a	O
maximum	O
database	O
size	O
of	O
75GB	O
,	O
but	O
only	O
supports	O
16GB	O
by	O
default	O
;	O
larger	O
sized	O
databases	O
have	O
to	O
be	O
updated-in	O
with	O
a	O
registry	B-Protocol
change	O
.	O
</s>
<s>
It	O
includes	O
new	O
clustering	B-Operating_System
options	O
,	O
x64	B-Device
support	O
for	O
greater	O
scalability	O
,	O
voice	O
mail	O
integration	O
,	O
better	O
search	O
and	O
support	O
for	O
Web	O
services	O
,	O
better	O
filtering	O
options	O
,	O
and	O
a	O
new	O
Outlook	B-Protocol
Web	I-Protocol
Access	I-Protocol
interface	O
.	O
</s>
<s>
Exchange	O
2007	O
also	O
dropped	O
support	O
for	O
Exchange	O
5.5	O
migrations	O
,	O
routing	O
groups	O
,	O
admin	O
groups	O
,	O
Outlook	B-Application
Mobile	I-Application
Access	O
,	O
X.400	B-Protocol
,	O
and	O
some	O
API	O
interfaces	O
,	O
amongst	O
other	O
features	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
(	O
v8	O
,	O
code	O
name	O
E12	O
,	O
or	O
with	O
SP1	O
v8.1	O
)	O
runs	O
only	O
on	O
x64	B-Device
versions	O
of	O
Windows	O
Server	O
.	O
</s>
<s>
This	O
requirement	O
applies	O
to	O
supported	O
production	O
environments	O
only	O
;	O
a	O
32-bit	O
trial	B-License
version	I-License
is	O
available	O
for	O
download	O
and	O
testing	O
.	O
</s>
<s>
Hence	O
,	O
companies	O
currently	O
running	O
Exchange	B-Operating_System
Server	I-Operating_System
on	O
32-bit	O
hardware	O
will	O
be	O
required	O
to	O
replace	O
or	O
migrate	O
hardware	O
if	O
they	O
wish	O
to	O
upgrade	O
to	O
the	O
new	O
version	O
.	O
</s>
<s>
Companies	O
that	O
are	O
currently	O
running	O
Exchange	B-Operating_System
Server	I-Operating_System
on	O
64-bit	O
capable	O
hardware	O
are	O
still	O
required	O
to	O
migrate	O
from	O
their	O
existing	O
Exchange	O
2000/2003	O
servers	O
to	O
a	O
new	O
2007	O
server	O
since	O
in-place	O
upgrades	O
are	O
not	O
supported	O
in	O
2007	O
.	O
</s>
<s>
The	O
first	O
beta	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
(	O
then	O
named	O
"	O
Exchange	O
12	O
"	O
or	O
E12	O
)	O
was	O
released	O
in	O
December	O
2005	O
to	O
a	O
very	O
limited	O
number	O
of	O
beta	O
testers	O
.	O
</s>
<s>
On	O
April	O
25	O
,	O
2006	O
,	O
Microsoft	O
announced	O
that	O
the	O
next	O
version	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
would	O
be	O
called	O
"	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
"	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
is	O
an	O
integrated	O
part	O
of	O
the	O
Innovative	O
Communications	O
Alliance	O
products	O
.	O
</s>
<s>
Exchange	O
Management	O
Shell	B-Operating_System
:	O
a	O
new	O
command-line	B-Application
shell	B-Operating_System
and	O
scripting	B-Language
language	I-Language
for	O
system	O
administration	O
(	O
based	O
on	O
Windows	B-Application
PowerShell	I-Application
)	O
.	O
</s>
<s>
Shell	B-Operating_System
users	O
can	O
perform	O
every	O
task	O
that	O
can	O
be	O
performed	O
in	O
the	O
Exchange	B-Operating_System
Server	I-Operating_System
graphical	O
user	O
interface	O
plus	O
additional	O
tasks	O
,	O
and	O
can	O
program	O
often-used	O
or	O
complex	O
tasks	O
into	O
scripts	O
that	O
can	O
be	O
saved	O
,	O
shared	O
,	O
and	O
re-used	O
.	O
</s>
<s>
The	O
Exchange	O
Management	O
Shell	B-Operating_System
has	O
over	O
375	O
unique	O
commands	O
to	O
manage	O
features	O
of	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
Server	I-Operating_System
2007	O
.	O
</s>
<s>
Increased	O
maximum	O
storage	O
groups	O
and	O
mail	O
databases	O
per	O
server	O
:	O
5	O
each	O
for	O
Standard	O
Edition	O
(	O
from	O
one	O
each	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
Standard	O
)	O
,	O
and	O
to	O
50	O
each	O
for	O
Enterprise	O
Edition	O
(	O
from	O
4	O
groups	O
and	O
20	O
databases	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
Enterprise	O
)	O
.	O
</s>
<s>
Configure	O
Outlook	O
Anywhere	O
:	O
Formerly	O
known	O
as	O
RPC	O
over	O
HTTP	O
provides	O
external	O
access	O
to	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
Server	I-Operating_System
2007	O
for	O
users	O
.	O
</s>
<s>
Supports	O
LCR	O
(	O
Local	O
Continuous	O
Replication	O
)	O
,	O
SCR	O
(	O
Standby	O
Continuous	O
Replication	O
)	O
,	O
SCC	O
(	O
Single	O
Copy	O
Clustering	B-Operating_System
)	O
,	O
and	O
CCR	O
(	O
Clustered	O
Continuous	O
Replication	O
)	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
was	O
released	O
to	O
manufacturing	O
in	O
May	O
2009	O
,	O
and	O
reached	O
general	O
availability	O
on	O
November	O
9	O
,	O
2009	O
.	O
</s>
<s>
The	O
version	O
jumped	O
from	O
v8.x	O
in	O
Exchange	O
2007	O
to	O
v14.x	O
in	O
Exchange	O
2010	O
to	O
emphasise	O
the	O
synergy	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
with	O
the	O
Office	B-Operating_System
suite	I-Operating_System
.	O
</s>
<s>
A	O
CAS	O
array	O
can	O
contain	O
multiple	O
Client	O
Access	O
Servers	O
in	O
an	O
Active	B-Protocol
Directory	I-Protocol
site	O
and	O
provide	O
a	O
single	O
name	O
endpoint	O
for	O
client	O
connections	O
.	O
</s>
<s>
CAS	O
arrays	O
cannot	O
span	O
multiple	O
Active	B-Protocol
Directory	I-Protocol
sites.Mailbox	O
Server	O
Role	O
may	O
be	O
combined	O
with	O
the	O
Client	O
Access	O
Server	O
:	O
In	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
,	O
a	O
clustered	O
mailbox	O
server	O
could	O
not	O
be	O
combined	O
with	O
any	O
other	O
roles	O
.	O
</s>
<s>
In	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
,	O
the	O
Mailbox	O
Server	O
Role	O
may	O
be	O
combined	O
with	O
the	O
Client	O
Access	O
Server	O
and/or	O
Hub	O
Transport	O
roles	O
,	O
regardless	O
of	O
whether	O
or	O
not	O
the	O
mailbox	O
server	O
participates	O
in	O
a	O
Database	O
Availability	O
Group	O
.	O
</s>
<s>
However	O
,	O
since	O
Database	O
Availability	O
Groups	O
use	O
Windows	O
Failover	O
Clustering	B-Operating_System
,	O
and	O
Microsoft	O
does	O
not	O
support	O
the	O
combination	O
of	O
Windows	O
Failover	O
Clustering	B-Operating_System
and	O
Windows	O
Network	O
Load	O
Balancing	O
on	O
the	O
same	O
server	O
,	O
a	O
multi-role	O
deployment	O
will	O
require	O
the	O
use	O
of	O
a	O
3rd	O
party	O
load	O
balancer	O
to	O
provide	O
load	O
balancing	O
and	O
fault	O
tolerance	O
for	O
the	O
Client	O
Access	O
Server	O
role.RPC	O
Client	O
Access	O
:	O
With	O
the	O
introduction	O
of	O
the	O
RPC	O
Client	O
Access	O
service	O
,	O
all	O
Outlook	O
clients	O
access	O
their	O
mailbox	O
database	O
through	O
the	O
Client	O
Access	O
Server	O
role	O
.	O
</s>
<s>
This	O
abstraction	O
layer	O
allows	O
for	O
improved	O
load	O
balancing	O
and	O
redundancy	O
and	O
minimal	O
client	O
impact	O
in	O
the	O
event	O
of	O
a	O
database	O
level	O
*	O
-over	O
(	O
"	O
switchover	O
"	O
or	O
"	O
failover	O
"	O
)	O
event.Cost	O
savings	O
in	O
required	O
hardware	O
:	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
provides	O
cost	O
savings	O
in	O
required	O
hardware	O
.	O
</s>
<s>
Storage	O
performance	O
requirements	O
(	O
measured	O
in	O
IOPS	O
:	O
Input/output	O
operations	O
per	O
second	O
)	O
have	O
been	O
reduced	O
by	O
approximately	O
70%	O
over	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
,	O
and	O
by	O
approximately	O
90%	O
over	O
Exchange	B-Operating_System
Server	I-Operating_System
2003	O
.	O
</s>
<s>
According	O
to	O
a	O
case	O
study	O
,	O
Microsoft	O
IT	O
was	O
able	O
to	O
reduce	O
hardware	O
costs	O
by	O
75%	O
during	O
the	O
migration	O
from	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
to	O
Exchange	B-Operating_System
Server	I-Operating_System
2010.Personal	O
Archive	O
:	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
extends	O
the	O
large	O
mailbox	O
support	O
introduced	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2007	O
,	O
and	O
also	O
introduces	O
a	O
Personal	O
Archive	O
feature	O
to	O
allow	O
messages	O
to	O
be	O
retained	O
longer	O
without	O
the	O
need	O
for	O
a	O
third-party	O
archival	O
system	O
.	O
</s>
<s>
The	O
Personal	O
Archive	O
is	O
implemented	O
as	O
a	O
secondary	O
mailbox	O
for	O
archive-enabled	O
users	O
,	O
and	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
Service	O
Pack	O
1	O
,	O
the	O
Personal	O
Archive	O
may	O
be	O
located	O
on	O
a	O
different	O
database	O
than	O
the	O
primary	O
mailbox	O
,	O
which	O
may	O
reside	O
on	O
a	O
different	O
disk	O
if	O
desired	O
.	O
</s>
<s>
What	O
was	O
formerly	O
known	O
as	O
the	O
"	O
Dumpster	O
"	O
in	O
previous	O
versions	O
of	O
Exchange	O
(	O
a	O
special	O
storage	O
area	O
for	O
messages	O
that	O
have	O
been	O
deleted	O
from	O
the	O
Deleted	O
Items	O
folder	O
or	O
"	O
permanently	O
deleted	O
"	O
from	O
a	O
regular	O
folder	O
,	O
such	O
as	O
the	O
Inbox	O
)	O
has	O
been	O
evolved	O
into	O
the	O
Recoverable	O
Items	O
folder	O
in	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
.	O
</s>
<s>
If	O
configured	O
appropriately	O
,	O
the	O
Recoverable	O
Items	O
folder	O
allows	O
for	O
a	O
"	O
tamper	O
proof	O
"	O
storage	O
area	O
(	O
users	O
cannot	O
circumvent	O
the	O
Recoverable	O
Items	O
folder	O
to	O
bypass	O
legal	O
discovery	O
)	O
,	O
which	O
also	O
provides	O
a	O
revision	O
history	O
of	O
any	O
modified	O
items.Administration	O
delegation	O
:	O
Can	O
now	O
be	O
performed	O
at	O
a	O
granular	O
level	O
due	O
to	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
's	O
implementation	O
of	O
Role	O
Based	O
Access	O
Control	O
(	O
RBAC	O
)	O
.	O
</s>
<s>
Users	O
and	O
administrators	O
can	O
be	O
given	O
extremely	O
fine-grained	O
abilities	O
for	O
functions	O
provided	O
both	O
within	O
the	O
Exchange	O
Management	O
Console	O
or	O
Exchange	O
Management	O
Shell	B-Operating_System
and	O
in	O
Outlook	B-Protocol
Web	I-Protocol
App	I-Protocol
.	O
</s>
<s>
For	O
example	O
,	O
a	O
compliance	O
officer	O
may	O
be	O
given	O
the	O
ability	O
to	O
perform	O
cross	O
mailbox	O
discovery	O
searches	O
within	O
Outlook	B-Protocol
Web	I-Protocol
App	I-Protocol
;	O
a	O
help	O
desk	O
technician	O
may	O
be	O
granted	O
the	O
ability	O
to	O
set	O
an	O
Out	O
Of	O
Office	O
message	O
for	O
other	O
employees	O
within	O
the	O
company	O
,	O
or	O
a	O
branch	O
administrator	O
in	O
a	O
remote	O
office	O
may	O
be	O
granted	O
the	O
permission	O
to	O
perform	O
specific	O
Exchange	O
Management	O
Shell	B-Operating_System
commands	O
that	O
pertain	O
only	O
to	O
the	O
Exchange	B-Operating_System
server	I-Operating_System
in	O
their	O
branch	O
office.Outlook	O
Web	O
App	O
includes	O
improvements	O
:	O
Including	O
,	O
for	O
example	O
,	O
the	O
ability	O
for	O
users	O
to	O
track	O
their	O
sent	O
messages	O
and	O
printable	O
calendar	O
views	O
and	O
the	O
"	O
Premium	O
"	O
experience	O
is	O
now	O
available	O
across	O
multiple	O
browsers	O
(	O
including	O
Safari	O
and	O
Firefox	O
)	O
.Distribution	O
groups	O
can	O
now	O
be	O
"	O
moderated	O
"	O
:	O
Meaning	O
that	O
distribution	O
groups	O
can	O
now	O
be	O
configured	O
to	O
allow	O
users	O
to	O
join	O
at	O
will	O
or	O
only	O
with	O
a	O
group	O
moderator	O
's	O
permission	O
,	O
and	O
individual	O
messages	O
sent	O
to	O
distribution	O
groups	O
can	O
now	O
be	O
approved	O
or	O
denied	O
by	O
a	O
moderator	O
.	O
</s>
<s>
"	O
Shadow	O
Redundancy	O
"	O
:	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
introduces	O
a	O
transport	O
concept	O
called	O
"	O
Shadow	O
Redundancy	O
"	O
that	O
protects	O
e-mail	O
messages	O
while	O
they	O
are	O
in	O
transit	O
.	O
</s>
<s>
Several	O
high-availability	O
options	O
have	O
been	O
consolidated	O
into	O
just	O
one	O
option	O
for	O
Exchange	B-Operating_System
Server	I-Operating_System
2010	O
(	O
Mailbox	O
Resiliency	O
)	O
,	O
which	O
is	O
now	O
offered	O
in	O
both	O
the	O
Standard	O
and	O
Enterprise	O
editions	O
.	O
</s>
<s>
As	O
of	O
2020	O
,	O
the	O
United	O
States	O
Military	O
's	O
web	B-Protocol
email	I-Protocol
web.mail.mil	O
still	O
uses	O
this	O
version	O
of	O
exchange	B-Operating_System
server	I-Operating_System
.	O
</s>
<s>
Microsoft	O
reached	O
the	O
RTM	O
milestone	O
for	O
Exchange	B-Operating_System
Server	I-Operating_System
2013	O
(	O
v15.0	O
)	O
on	O
October	O
11	O
,	O
2012	O
.	O
</s>
<s>
A	O
trial	B-License
version	I-License
of	O
this	O
product	O
is	O
available	O
from	O
Microsoft	O
website	O
.	O
</s>
<s>
Microsoft	O
support	O
only	O
the	O
current	O
and	O
"	O
n-1	O
"	O
Cumulative	O
Update	O
release	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
2013	O
and	O
later	O
during	O
mainstream	O
support	O
,	O
and	O
only	O
the	O
current	O
CU	O
once	O
the	O
transition	O
to	O
extended	O
support	O
completes	O
.	O
</s>
<s>
New	O
features	O
include:Offline	O
support	O
in	O
OWA	O
:	O
Emails	O
and	O
actions	O
are	O
automatically	O
synced	O
the	O
next	O
time	O
connectivity	O
is	O
restored.Client	O
connectivity	O
:	O
CAS	O
role	O
is	O
the	O
point	O
of	O
connectivity	O
for	O
all	O
clients	O
in	O
Exchange	O
2013.Public	O
folders	O
:	O
In	O
2013	O
,	O
public	O
folders	O
are	O
now	O
part	O
of	O
mailbox	O
databases	O
and	O
high	O
availability	O
is	O
achieved	O
using	O
DAG.Site	O
Mailboxes	O
:	O
Brings	O
Exchange	B-Operating_System
emails	I-Operating_System
and	O
SharePoint	B-Protocol
documents	O
together.Outlook	O
Web	O
App	O
:	O
Offers	O
three	O
different	O
UI	O
layouts	O
optimized	O
for	O
desktop	O
,	O
tablet	O
,	O
and	O
mobile	O
phone	O
browsers.Ability	O
to	O
customize	O
:	O
Outlook	O
and	O
OWA	O
by	O
integrating	O
apps	O
from	O
the	O
Office	O
marketplace	O
.	O
</s>
<s>
Also	O
:	O
new	O
policy	O
tips	O
in	O
Outlook	O
2013	O
can	O
be	O
set	O
to	O
inform	O
users	O
about	O
potential	O
policy	O
violations.In-Place	O
eDiscovery	O
:	O
Can	O
be	O
run	O
across	O
Exchange	O
,	O
SharePoint	B-Protocol
,	O
and	O
Lync	O
(	O
now	O
Skype	B-Protocol
for	I-Protocol
Business	I-Protocol
)	O
from	O
a	O
single	O
interface.Combine	O
Roles	O
:	O
A	O
reduction	O
in	O
the	O
number	O
of	O
available	O
roles	O
to	O
two	O
:	O
a	O
Client	O
Access	O
Server	O
and	O
a	O
Mailbox	O
Server	O
role.FAST	O
Search	O
:	O
Now	O
integrated	O
into	O
Exchange	O
2013	O
managed	O
store	O
to	O
provide	O
a	O
more	O
consistent	O
(	O
across	O
Microsoft	O
servers	O
)	O
indexing	O
and	O
searching	O
experience.Inclusion	O
of	O
a	O
"	O
Managed	O
Store	O
"	O
:	O
The	O
name	O
of	O
the	O
rewritten	O
information	O
store	O
processes	O
,	O
which	O
are	O
now	O
written	O
in	O
C#	O
.Replication	O
:	O
Public	O
folders	O
are	O
now	O
stored	O
in	O
mailbox	O
databases	O
and	O
can	O
take	O
advantage	O
of	O
Database	O
Availability	O
Groups	O
for	O
replication	O
and	O
high	O
availability.Data	O
loss	O
prevention	O
:	O
Capabilities	O
that	O
can	O
be	O
integrated	O
into	O
Transport	O
Rules.MAPI	O
over	O
HTTPS	O
:	O
New	O
protocol	O
designed	O
from	O
the	O
ground	O
up	O
to	O
replace	O
Outlook	O
Anywhere	O
.	O
</s>
<s>
This	O
functionality	O
requires	O
that	O
all	O
Exchange	O
2013	O
Servers	O
are	O
running	O
at	O
least	O
Service	O
Pack	O
1	O
;	O
it	O
is	O
disabled	O
by	O
default	O
in	O
organizations	O
where	O
Exchange	B-Operating_System
Server	I-Operating_System
2013	O
has	O
been	O
installed	O
and	O
must	O
be	O
manually	O
enabled	O
once	O
the	O
prerequisites	O
are	O
met	O
.	O
</s>
<s>
On	O
October	O
1	O
,	O
2015	O
,	O
Microsoft	O
announced	O
the	O
general	O
availability	O
(	O
GA	O
)	O
of	O
Exchange	B-Operating_System
Server	I-Operating_System
2016	O
(	O
v15.1	O
)	O
.	O
</s>
<s>
New	O
featuresCombine	O
Roles	O
:	O
A	O
reduction	O
in	O
the	O
number	O
of	O
available	O
roles	O
to	O
two	O
:	O
Mailbox	O
Server	O
and	O
Edge	O
Transport	O
Outlook	B-Protocol
on	I-Protocol
the	I-Protocol
web	I-Protocol
(	O
formerly	O
Outlook	B-Protocol
Web	I-Protocol
App	I-Protocol
)	O
:	O
UI	O
changesOffice	O
365	O
hybrid	O
:	O
The	O
Hybrid	O
Configuration	O
Wizard	O
(	O
HCW	O
)	O
that	O
was	O
included	O
with	O
Exchange	O
2013	O
is	O
moving	O
to	O
become	O
a	O
cloud-based	O
application	O
.	O
</s>
<s>
Exchange	B-Operating_System
Server	I-Operating_System
2019	O
(	O
v15.2	O
)	O
was	O
released	O
in	O
October	O
2018	O
.	O
</s>
<s>
Unlike	O
other	O
Office	O
Server	O
2019	O
products	O
such	O
as	O
SharePoint	B-Protocol
and	O
Skype	B-Protocol
for	I-Protocol
Business	I-Protocol
,	O
Exchange	B-Operating_System
Server	I-Operating_System
2019	O
can	O
only	O
be	O
deployed	O
on	O
Windows	O
Server	O
2019	O
.	O
</s>
<s>
One	O
of	O
the	O
key	O
features	O
of	O
the	O
new	O
release	O
is	O
that	O
Exchange	B-Operating_System
Server	I-Operating_System
can	O
be	O
deployed	O
onto	O
Windows	O
Server	O
Core	O
for	O
the	O
first	O
time	O
,	O
additionally	O
Microsoft	O
has	O
retired	O
the	O
Unified	O
Messaging	O
feature	O
of	O
Exchange	O
,	O
meaning	O
that	O
Skype	B-Protocol
for	I-Protocol
Business	I-Protocol
on-premises	O
customers	O
will	O
have	O
to	O
use	O
alternative	O
solutions	O
for	O
voicemail	O
,	O
such	O
as	O
Azure	O
cloud	O
voicemail	O
.	O
</s>
