This article applies to:

• Trustwave MailMarshal (SEG) 7.0 and above
• Trustwave ECM/MailMarshal Exchange 7.X

Symptoms:

• Messages queue in the "Incoming" queue folder
• No messages are processed by the Engine service

Causes:

• Windows Search is enabled on the processing node server.
• When the Windows Search service is enabled on SEG or ECM processing servers, it can lock files in the incoming queue folder.
• The Engine service is unable to retrieve or process the email from the incoming queue folder.

Resolution:

To resolve this issue, disable Windows Search on all SEG or ECM processing servers.

• Open the Windows Services control panel.
• Locate the service labelled "Windows Search."
• Stop and disable this service. 

Alternatively you could add exclusions to the search service. Exclude all folders that must be excluded from virus scanning. See article Q10850.

Notes:

• The "Windows Search" service is not installed by default on Windows 2008 and 2012 servers.
• This issue could also affect the unpacking and quarantine folders, or any folder where files are frequently created, quickly accessed and deleted.