Avira Exchange Security might not work anymore after installing Service Pack 1 for Microsoft Exchange Server 2013

After you have installed Microsoft Exchange Server 2013 Service Pack 1 (SP1) or have upgraded an existing Microsoft Exchange Server 2013 installation with SP1, Avira Exchange Security transport agents cannot be installed correctly anymore, rendering it non-functional.
However, this can be solved with a hotfix provided by Microsoft.
Please refer to this article and apply/download the fix from there.

See which scenario applies to you and follow the instructions accordingly:

New installation of Avira Exchange Security on Microsoft Exchange Server 2013


If you have not installed Avira Exchange Security on Microsoft Exchange Server 2013 with SP1 yet, make sure to apply the hotfix before the installation.
If the Microsoft Hotfix has been applied after you installed Avira Exchange Security, you will need to install the transport agent again, e.g. with a repair installation.

Avira Exchange Security already installed on Microsoft Exchange Server 2013


If you have Avira Exchange Security installed on Microsoft Exchange Server 2013 and you would like to upgrade with SP1, you will have to apply the hotfix afterwards. Otherwise the transport agent will not run.

Affected products

  • Avira Exchange Security [Windows]
  • Created : Friday, March 7, 2014
  • Last updated: Monday, March 10, 2014
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