I have a single multi-role Exchange 2013 server and it would appear that it's not properly maintaining the temp files for the transport service.  I still have all those folder locations at their default and the problem folder is c:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\data\Temp

I never had a problem with this in Exchange 2007 but I am used to running a PowerShell script nightly to clean up the IIS log files.  Do I need to do something similar for this temp folder?  Is there a setting I can adjust so that Exchange will limit the size of this folder itself?  If I stop the transport service and delete the files here will I lose anything?

Any suggestions or insight would be greatly appreciated.

• Edited by Gaven LS Thursday, August 08, 2013 5:48 PM

I have the same problem and at the moment I got ~20GB of files in TEMP folder and it's still growing. I wonder why does it happen and is this normal? And can I safely delete content of this folder? Has anybody already tried to delete it ?

• Edited by przemyslawb Tuesday, October 15, 2013 1:11 PM

Well, in my case, I fixe the problem by disabling the Antispam feature in my Edge Transport Server:
On the HubTransportServer
Set-ContentFilterConfig -Enabled $false
C:\Program Files\Microsoft\Exchange Server\V15\Scripts
.\uninstall-antispamagents.ps1

Since i'm not receiving directly and everythings goes throw Postini...

Still on CU3.

50GB temp folder

Disabled anti malware

Can I nuke the old temp files (3yrs worth)