<s>
Windows	B-Application
Messenger	I-Application
is	O
a	O
discontinued	O
instant	B-Application
messaging	I-Application
client	O
included	O
in	O
Windows	B-Application
XP	I-Application
.	O
</s>
<s>
Designed	O
for	O
use	O
by	O
both	O
corporate	O
and	O
home	O
users	O
,	O
it	O
was	O
originally	O
created	O
,	O
in	O
2001	O
,	O
as	O
a	O
streamlined	O
and	O
integrated	O
version	O
of	O
MSN	B-Protocol
Messenger	I-Protocol
.	O
</s>
<s>
It	O
was	O
upgraded	O
several	O
times	O
when	O
it	O
was	O
made	O
available	O
for	O
Windows	B-Application
2000	I-Application
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
.	O
</s>
<s>
It	O
was	O
superseded	O
by	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
and	O
Microsoft	B-Protocol
Lync	I-Protocol
.	O
</s>
<s>
Windows	B-Application
Messenger	I-Application
was	O
introduced	O
in	O
Windows	B-Application
XP	I-Application
on	O
October	O
22	O
,	O
2001	O
.	O
</s>
<s>
Its	O
features	O
include	O
instant	B-Application
messaging	I-Application
,	O
presence	O
awareness	O
,	O
support	O
for	O
Session	B-Application
Initiation	I-Application
Protocol	I-Application
(	O
SIP	O
)	O
,	O
file	O
transfer	O
,	O
application	O
sharing	O
and	O
whiteboarding	B-Protocol
.	O
</s>
<s>
Later	O
versions	O
added	O
"	O
ink	O
"	O
support	O
and	O
integration	O
with	O
Microsoft	B-Protocol
Lync	I-Protocol
Server	I-Protocol
(	O
formerly	O
Microsoft	B-Protocol
Office	I-Protocol
Communications	I-Protocol
Server	I-Protocol
)	O
.	O
</s>
<s>
Windows	B-Application
Messenger	I-Application
's	O
user	O
interface	O
is	O
devoid	O
of	O
the	O
clutter	O
seen	O
in	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
.	O
</s>
<s>
Winks	O
,	O
nudges	O
,	O
and	O
custom	O
emoticons	O
are	O
unavailable	O
,	O
and	O
the	O
main	O
user	O
interface	O
more	O
closely	O
resembles	O
the	O
standard	O
Windows	B-Application
XP	I-Application
Luna	O
style	O
.	O
</s>
<s>
Windows	B-Application
Messenger	I-Application
integrates	O
with	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
Server	I-Operating_System
,	O
Microsoft	B-Application
Outlook	I-Application
,	O
Outlook	B-Application
Express	I-Application
,	O
Remote	B-Protocol
Assistance	I-Protocol
and	O
Windows	B-Device
Media	I-Device
Center	I-Device
in	O
Windows	B-Application
XP	I-Application
.	O
</s>
<s>
Windows	B-Application
Messenger	I-Application
can	O
communicate	O
with	O
the	O
Exchange	B-Operating_System
Server	I-Operating_System
2000	O
's	O
Instant	B-Application
Messaging	I-Application
Service	O
and	O
Microsoft	O
Messenger	O
Service	O
.	O
</s>
<s>
Development	O
of	O
Windows	B-Application
Messenger	I-Application
was	O
halted	O
after	O
version	O
5.1	O
in	O
favor	O
of	O
Windows	B-Protocol
Live	I-Protocol
Messenger	I-Protocol
and	O
Microsoft	B-Protocol
Lync	I-Protocol
.	O
</s>
