A new erratum update is available for Univention Corporate Server 4.0.
It is applicable to the following patch-levels: 2.
It addresses the following problem:

Program component:  univention-mail-cyrus
Reference:          bug 39004
Fixed version:      7.0.4-2.207.201507280923

This update addresses the following issue:
* An API change introduced in erratum 217 and a UDM module move in
  erratum 236 led to UDM/UMC problems on UCS systems with an UCS
  version prior to 4.0-2 errata level 217.
  The UDM module policies/mailquota is now able to use the old and
  the new API.

We recommend to update your UCS installation. Updated packages are
available in the Univention online repository, which is automatically
added to the apt packages sources. The following procedures can be
used to update a UCS installation:

1. A single system can be updated in the web interface of the
Univention Management Console through the "Software update" module.

2. A single system can be updated on the command line by running the
command "univention-upgrade"

3. Multiple systems can be updated through a maintenance policy.

Additional information can be found in the UCS manual.