<s>
Univention	B-Application
Corporate	I-Application
Server	I-Application
(	O
UCS	O
)	O
is	O
a	O
server	O
operating	O
system	O
derived	O
from	O
Debian	O
with	O
an	O
integrated	O
management	O
system	O
for	O
the	O
central	O
and	O
cross-platform	O
administration	O
of	O
servers	O
,	O
services	O
,	O
clients	O
,	O
desktops	O
and	O
users	O
as	O
well	O
as	O
virtualized	O
computers	O
operated	O
in	O
UCS	O
.	O
</s>
<s>
Via	O
the	O
integration	O
of	O
the	O
open	B-Application
source	I-Application
software	I-Application
Samba	B-Language
4	I-Language
,	O
Univention	O
also	O
supports	O
the	O
functions	O
provided	O
in	O
many	O
companies	O
by	O
Microsoft	B-Protocol
Active	I-Protocol
Directory	I-Protocol
for	O
the	O
administration	O
of	O
computers	O
operated	O
with	O
Microsoft	O
Windows	O
.	O
</s>
<s>
Docker	B-Language
containers	I-Language
can	O
also	O
be	O
run	O
on	O
UCS	O
systems	O
and	O
several	O
of	O
the	O
apps	O
available	O
in	O
the	O
App	O
Center	O
are	O
Docker-based	O
.	O
</s>
<s>
Univention	O
is	O
a	O
member	O
of	O
the	O
Open	O
Source	O
Business	O
Alliance	O
and	O
supports	O
the	O
creation	O
of	O
the	O
Open	O
Source	O
Business	O
Alliance	O
open	B-Application
source	I-Application
software	I-Application
stacks	O
.	O
</s>
<s>
The	O
impulse	O
for	O
the	O
development	O
of	O
UCS	O
,	O
which	O
began	O
in	O
2002	O
,	O
was	O
the	O
lack	O
of	O
a	O
standardised	O
Linux	B-Application
server	O
operating	O
system	O
offering	O
companies	O
and	O
organisations	O
an	O
alternative	O
to	O
Microsoft	O
's	O
domain	O
concept	O
with	O
the	O
proprietary	O
directory	O
service	O
Active	B-Protocol
Directory	I-Protocol
.	O
</s>
<s>
Comparable	O
Linux	B-Application
solutions	O
(	O
e.g.	O
,	O
from	O
SUSE	O
and	O
Red	O
Hat	O
)	O
did	O
not	O
offer	O
an	O
integrated	O
,	O
cross-system	O
user	O
and	O
computer	O
management	O
system	O
,	O
with	O
the	O
result	O
that	O
corresponding	O
solutions	O
had	O
to	O
be	O
configured	O
and	O
maintained	O
individually	O
.	O
</s>
<s>
UCS	O
is	O
open-source	B-Application
software	I-Application
;	O
the	O
proprietary	O
developments	O
of	O
Univention	O
GmbH	O
included	O
in	O
UCS	O
were	O
published	O
under	O
the	O
GNU	O
GPL	O
until	O
Version	O
2.3	O
.	O
</s>
<s>
With	O
the	O
launch	O
of	O
Version	O
2.4	O
,	O
the	O
company	O
switched	O
to	O
GNU	B-Application
AGPL	I-Application
.	O
</s>
<s>
Univention	B-Application
Corporate	I-Application
Server	I-Application
is	O
based	O
on	O
the	O
Debian	O
Linux	B-Application
distribution	O
.	O
</s>
<s>
There	O
are	O
numerous	O
open	O
source	O
applications	O
integrated	O
in	O
UCS	O
,	O
for	O
example	O
Samba	B-Language
,	O
the	O
authentication	O
service	O
Kerberos	B-Protocol
,	O
the	O
virtualization	O
software	O
KVM	B-Application
,	O
and	O
Nagios	B-Application
for	O
the	O
monitoring	O
of	O
servers	O
.	O
</s>
<s>
UCS	O
uses	O
the	O
directory	O
service	O
OpenLDAP	B-Language
to	O
save	O
data	O
for	O
identity	O
and	O
system	O
management	O
.	O
</s>
<s>
In	O
this	O
way	O
,	O
the	O
integrated	O
tool	O
Active	B-Protocol
Directory	I-Protocol
Connection	O
allows	O
the	O
bidirectional	O
synchronisation	O
of	O
the	O
Microsoft	O
directory	O
service	O
Active	B-Protocol
Directory	I-Protocol
and	O
the	O
directory	O
service	O
used	O
in	O
UCS	O
,	O
OpenLDAP	B-Language
.	O
</s>
<s>
The	O
Univention	O
App	O
Center	O
includes	O
,	O
beside	O
Univention	O
solutions	O
,	O
for	O
example	O
,	O
the	O
Open	O
Source	O
groupware	O
solutions	O
Kopano	B-Protocol
,	O
Open-Xchange	B-Protocol
,	O
the	O
document	O
management	O
system	O
agorum	B-Protocol
core	I-Protocol
,	O
the	O
slack	O
alternative	O
rocket.chat	O
and	O
the	O
dropbox	O
alternatives	O
ownCloud	B-Language
and	O
Nextcloud	B-General_Concept
,	O
with	O
the	O
collaboration	O
solutions	O
ONLYOFFICE	B-Application
and	O
Collabora	B-General_Concept
Online	I-General_Concept
.	O
</s>
