Following successful installation of the Email Signature Manager Transport Agent on Exchange Server 2013 SP1, the transport agent has not actually been installed.
When executing the Get-TransportAgent cmdlet in the Exchange Management Shell, the Email Signature Manager Transport Agent is not listed.
When attempting to manually install by executing the Install-TransportAgent cmdlet an error occurs about the TransportAgentFactory type being incorrect.
This is a known issue with Exchange Server 2013 SP1. The global assembly cache (GAC) policy configuration files contain invalid XML code.
Follow these steps to resolve the problem:
- Uninstall the Email Signature Manager Transport Agent.
- Install Exchange Server 2013 Cumulative Update 5 (CU5) or newer.
- Reinstall the Email Signature Manager Transport Agent.
Email Signature Manager, version 8 and later