This article applies to:

• Trustwave ECM/MailMarshal Exchange
• Exchange 2013 SP1

Symptoms:

• Attempting to install and enable the Agent for integration with Exchange
• Error message: ServiceManager_SetAgentStatus Failed: No error message returned
• Install log may show The TransportAgentFactory type must be the Microsoft .NET class type of the transport agent factory

Causes:

• The issue is due to a problem with Exchange 2013 SP1. See Microsoft Knowledgebase article Q2938053.

Resolution:

• On the Exchange server where the Agent is to be installed, apply the hotfix as described in the Microsoft article.
• After the hotfix is applied, install and enable the ECM Agent. 

Notes:

Experience indicates a restart of the affected system is required in some cases after installing the Microsoft hotfix.