New in version 4.1 M1

October 7th, 2015
  • The milestone aims at channel partners, technology partners and interested parties, who want to take a first glance at the upcoming release of Univention Corporate Server (UCS). It already includes the Docker integration for the App Center and Single Sign-On for the UCS management system via SAML, the Linux kernel in version 4.1 and a pre release of Samba 4.3.
  • It happened in the past for example that apps required different versions of a software library which caused conflicts on a system. It is one example amoung many. With Docker such problems and other challenges are solved, because apps a encapsulated and especially security is increased. Docker simplifies the deployment of Apps via dedicated containers.
  • In UCS 4.1 Single Sign-On via SAML is built-in. The UCS management system supports it out-of-the-box. UCS integrates an established Single Sign-On technology that is used and offered by many services in the Internet as business feature. Apps can utilize the framework with UCS 4.1, as well, to for example increase the user experience with a single login to the environment.

New in version 4.0-3 (August 12th, 2015)

  • The mail server Dovecot has been integrated as standard IMAP/POP3 server into UCS and offers an alternative to the still available Cyrus IMAP server. More information is available in this blog article.
  • The compatibility to Active Directory has been improved with the Samba update to 4.2.3. This includes, among others, improvements in the DRS replication and the printer driver handling. In addition, the join of Huawai storage systems in the Active Directory domain provided by UCS is now also possible.
  • Several enhancements in design and usability of the Univention Management Console have been implemented. For example, it is now possible to use the forward and back buttons of the web browser. This allows a simpler and faster navigation in the management interface.
  • LDAP filters can now be defined for LDAP policies. That means the LDAP policy applies only to the objects that match the LDAP filter. This makes it possible to use LDAP policies in an easy and generic way especially in large environments.
  • The Linux kernel has been updated to the latest stable version of the 3.16 longterm kernel. This includes several security updates as well as new and updated drivers for a better hardware support.
  • All security updates released for UCS 4.0-2 are included in this update. It is now also possible to redirect all HTTP requests to HTTPS by only setting an Univention Configuration Registry variable. This increases the security of the UCS system.

New in version 4.0-2 (May 12th, 2015)

  • The Free for personal Use licence was replaced by the UCS Core Edition license. This allows the usage of UCS in commercial settings without charge. The upgrade of the licence is described in SDB 1324. Further information on the UCS Core Edition is provided on
  • The container virtualization Docker was added to UCS. This allows to run Docker containers on UCS systems. First Docker images of UCS itself are also available. Further information is provided on
  • For creating Apps a separate tutorial is now available.
  • An App installed on a remote system is now automatically configured by running its join scripts.
  • Several enhancements and bugfixes in design and usability of the Univention Management Console were done.
  • A mode to install UCS systems unattended over the network was added.
  • The compatibility to Active Directory has been improved. This allows Windows 2008 R2 Foundation Servers to join the domain as a member server. In addition to that a problem regarding the resolution of SIDs with NetApp Storage Systems has been fixed.
  • The web server Apache and mail server Postfix now support several additional settings related to encryption and other security related options. In addition to that several old cryptographic algorithms have been disabled by default.

New in version 4.0-1 (February 11th, 2015)

  • Integration of the Debian "Wheezy" 7.8 point update
  • Extending the "Free for personal Use" edition license to 50 users and 50 clients
  • Simplified system installation and setup of cloud instances by improvements in the appliance mode
  • Simplified join to an Active Directory domain
  • Multiple bugfixes and improvements related to Samba, e.g. in the printer support and using Microsoft Sharepoint
  • Several enhancements and bugfixes in design and usability of the Univention Management Console
  • Updated DVD ISO Image for 64 Bit
  • Update DVD for 32 Bit and 64 Bit
  • Updated virtual machine images for VMware Player, VMware ESX and VirtualBox

New in version 4.0 (November 20th, 2014)

  • The design and the usability of the graphical administration interface Univention Management Console were completely revamped. By using a responsive design, Univention Management Console provides improved compatibility for tablets and smartphones.
  • In addition to local virtualization servers, the UCS Virtual Machine Manger (UVMM) can now also manage OpenStack or Amazon EC2 environments. This allows the setup of hybrid cloud scenarios out-of-the-box with UCS.
  • UCS 4.0 is based on Debian GNU/Linux 7.7 (Wheezy). More than 16,000 source packages were updated. Selected core components, e.g. OpenLDAP (2.4.40), Samba (4.2rc2) or the Linux kernel (3.16) are more recent in UCS compared to Debian GNU/Linux 7.7.
  • The installation of UCS has been simplified significantly. The base installation is now done using the Debian installer and it is concluded with a web-based configuration of the system. The same, web-based system is also used for the manual configuration of cloud images or other appliances.
  • The performance of the OpenLDAP directory service has been significantly improved. By default the memory-mapped storage backend (MDB) is now used when installing UCS.
  • The management of applications in the UCS domain has been simplified through a centralised App Center. This allows the installation of applications in the entire domain from a single system.
  • UCS now also supports the installation on systems using UEFI SecureBoot.

New in version 3.2-4 (November 12th, 2014)

  • Improvement for the operation of UCS in Microsoft Windows Active Directory domains
  • Improvement for the migration of Active Directory to UCS
  • Increased security in UCS by activating perfect forward secrecy by default and using SHA256 as default hash

New in version 4.0 RC (November 7th, 2014)

  • The release candidate aims at channel partners, technology partners and interested parties, who want to take a first glance at the upcoming release of Univention Corporate Server (UCS). It includes support for UEFI Secure Boot, the central App Center for the comfortable App administration, further improvements of the responsive design of the completely redesigned graphic interface of the UCS management system especially concerning smartphones and the updated packages from Debian 7.7.
  • The release candidate of UCS 4.0 is available as DVD-ISO for amd64. The installed system is configured to retrieve package updates from It allows to easily follow the development of UCS 4.0 by just updating the packages. The release candidate is meant exclusively for testing purposes rather than production use.

New in version 4.0 Milestone 2 (October 8th, 2014)

  • It already includes a preview of the completely redesigned Univention Management Console, the web-based graphical interface of UCS' infrastructure management system, with the aim to improve overall usability. It also includes a connection with OpenStack and Amazon EC2 to manage hybrid clouds.
  • The milestone aims at channel partners, technology partners and interested parties, who want to take a first glance at the upcoming release of Univention Corporate Server (UCS), which is planned for mid of November 2014.

New in version 3.2-3 (August 12th, 2014)

  • The new module Active Directory Connection merges the domain administrated by UCS and an existing Active Directory. UCS is then available as a platform for the integrated operation of apps in an Active Directory domain.
  • The UCS setup wizard has been completely overhauled and now guides users particularly comfortably through the domain configuration of UCS and detects, for example, configuration settings automatically and suggests useful defaults.
  • PHP 5.4.4 has been back-ported to UCS 3.2. It can be installed from a separate repository and will receive security updates.
  • The OpenLDAP replication has been improved significantly by tracking changes in the directory service with unique IDs. The replication performance has been improved and replication errors have been reduced.
  • The Linux Kernel package has been updated to version 3.10.11. Besides many bug fixes, this improves the hardware support.
  • The Active Directory compatibility has been improved. UCS now supports the Microsoft Data Protection Application Program Interface (DPAPI).

New in version 3.2-2 (May 15th, 2014)

  • Domain joining of Windows clients with incorrect system times has been simplified; it is now no longer necessary to synchronise the system time in advance. In addition, password lockouts following unsuccessful login attempts are now also supported in Samba AD domains.
  • Univention AD Takeover - the UCS solution for the automatic migration of an Active Directory domain to UCS - can now also be performed via a Univention Management Console module.
  • The Univention App Center has been expanded further, for example: it is now also possible to provide applications which are not available for all processor architectures.
  • The configuration of the access to WLAN networks via the RADIUS protocol can now be configured in the Univention Management Console thanks to the new Radius app.
  • The Debian point update 6.0.9 has been integrated. It includes a wide range of bug fixes.

New in version 3.2-1 (February 18th, 2014)

  • The Linux kernel package was updated to 3.10.26. Besides many bugfixes this also improves the hardware support.
  • The Univention App Center was extended: Beside several bugfixes new interfaces are provided which improve the integration of third party applications.
  • Univention AD Takeover - the UCS solution for the automatic migration of an Active Directory domain to UCS - was improved further; it now also support the migration of AD domains operated in languages other than English or German.
  • Multiple usability enhancement in the Univention Management Console (UMC).

New in version 3.2 (November 20th, 2013)

  • The operation of the Univention Management Console has been optimised and simplified in a number of points, e.g., there are now simplified wizards for creating users and internal system users are no longer shown in the basic setting. In addition, the Univention Management Console now offers single sign-on; logging in once allows users to access different UMC instances.
  • SAML (Security Assertion Markup Language) is an XML-based standard for exchanging authentication information, which allows single sign-on across domain boundaries. UCS now provides a SAML identity provider: The external service (e.g., Salesforce) is then registered via a cryptographic certificate and trusted by the identity provider. The user then only needs to authenticate himself in UCS and can use the integrated service without renewed authentication.
  • The Univention App Center has been expanded further and offers more extensive integration possibilities for third-parties (e.g., relations of apps and optional ordering of apps from the App Center). The standard UCS components are now also installed/removed via the App Center.
  • Samba 4 has been updated to Version 4.1. SMB2 is used as the preferred protocol for file services instead of CIFS. The Univention S4 Connector has been considerably speeded up and the synchronization of groups improved.
  • Bridges, bondings and VLANs can now also be configured in the Univention Management Console.
  • The underlying Debian base has been updated to version 6.0.8; this imparts numerous improvements and bug fixes.
  • The Linux kernel has been updated to 3.10.15.
  • The management of shares has been simplified. NFSv4 is now also supported for NFS shares.
  • Proxy authentication is now also possible via Kerberos.

New in version 3.1-1 (April 9th, 2013)

  • Extensive improvements in Univention App Center and concerning the usability of the UCS management systems on mobile devices.
  • Users can now provide direct feedback to Univention with a feedback button.
  • An update of the Debian basis to the Debian 6.0.7 point update.
  • An update to Samba 4.0.3.
  • A pre-installed VMware image and VirtualBox image are now available for download.
  • An update of Linux kernels to V3.2.39.
  • New DVD ISO files for i386 and amd64.
  • An update for the AMI Univention Corporate Server (UCS) 3.1 (official image) rev. 5 in Amazon's AWS.
  • A new UMC module to view the configuration of Bridges, VLANs, and Bonding.

New in version 3.1 (December 14th, 2012)

  • With the brand new Version 3.1, UCS has developed into a comprehensive operating and management platform for IT infrastructures in companies and authorities of all shapes and sizes. In contrast to single-server solutions, UCS also supports the operation of a large number of servers at several sites in a shared, secure trust context. As such, UCS 3.1 also permits the simple integration of cloud-based services. Consequently, UCS 3.1 offers organisations a high degree of flexibility in terms of the adaption of cloud strategies.
  • New: Univention App Center: choose the applications, install them and run them:
  • Particularly with the new Univention App Center, UCS offers excellent and easy-to-use possibilities for trying out applications on the cloud or in your own computer centre. The user sees immediately which applications are available in the App Center and can then simply install and uninstall them with a click of the mouse. In this way, UCS also represents a simple test possibility for new applications and makes it possible to expand existing environments with extra functions, for example from the fields of collaboration and CRM.
  • In UCS 3.1, in addition to Univention solutions, such as the preview version of the new desktop and thin client product Univention Corporate Client (UCC) for now, the App Center also includes a range of third-party applications such as the groupware solutions Zarafa and Open-Xchange, the backup solution “SEP sesam”, the document management system agorum core, the customer management
  • solution “SugarCRM” and the Dropbox alternative “owncloud”. According to Univention, other manufacturers are currently also working on making their software available in the Univention App Center. The App catalogue at: gives users an overview of all the applications currently available in the Univention App Center.
  • New tool for simplified migration from Active Directory to Samba 4:
  • In addition to a Samba 4 version far beyond the official release of Samba 4 approved two days ago, UCS 3.1 also boasts a new tool for simplified migration of existing Microsoft Active Directory environments to UCS. Among other features, this tool automatically adopts user and computer accounts as well as group policies from Microsoft Active Directory. This allows administrators to replace an existing Active Directory with UCS very easily and without the need to remount Microsoft Windows clients in the domain.
  • User-friendly, simple network configuration and improved hardware support:
  • The user interface of the UCS management systems for user and domain management has also been revised: administrators can now select individual management modules as favourites and in doing so easily personalise the UCS management tools.
  • In addition to a wide range of additional updates to important UCS components, such as the virtualization software Xen or the directory service OpenLDAP, UCS 3.1 also features a new module for network configuration with which the network settings for virtualized guest operating systems in particular are now considerably simpler. The Linux kernel has been updated to Version 3.2.30 and UCS 3.1 now supports the BIOS successor UEFI (Unified Extensible Firmware Interface), which is a component of newer hardware.
  • New documentation, prices and availability:
  • UCS 3.1 is available as a DVD-ISO for i386 and amd64. Test versions can be downloaded from: Test systems can also be expanded to commercial UCS licenses without any problems. For 50 employees, Univention Corporate Server costs €985 with installation support and €1,885 with standard support — both versions include one year of maintenance.