You are installing Exclaimer Signature Manager Exchange Edition and the following warning message is displayed:

Missing pre-requisite: This application must be installed on an Exchange server with the following roles:

For Exchange 2007/2010 - Hub Transport

For Exchange 2013/2016 - Mailbox server


This issue requires an update in the Windows registry for the installation server. If you are not familiar with the Windows registry, you may wish to read about the Windows registry before attempting any changes.

Windows Registry modifications should always be approached with extreme care - serious problems might occur if you modify the Windows registry incorrectly.

We strongly advise you to back up the Windows registry before any modifications are made - in doing so you will have the option to restore the backup if a problem occurs. For further information about how to back up and restore the Windows registry, see Microsoft KB Article 322756 : How to back up and restore the registry in Windows in the Microsoft Knowledge Base.

To update the Windows registry:

  • Access the registry editor (regedit).
  • Ensure that the following registry key is present:


Where ConfiguredVersion should match that of the Microsoft Exchange server. For example:

Mail Disclaimers Signature Manager Exchange Edition Troubleshooting