One of our mailbox servers has built up nearly 40GB in the C:\Program Files\Microsoft\Exchange Server\Working\OleConverter folder and this is consuming most of the system drive. The files in here appear to be temp copies of various types of attachments dating back from today to when the server was built about 18 months ago.
The only references I can find to this folder relate to excluding it from virus scans. I can't find anything relating to controlling its size - the other mailbox servers all have similar folders but varying in size from 6 GB to 17 GB, so not causing a problem (yet)!
Can these files be deleted (or should they be being cleaned up as part of a maintenance routine)? Is the fact that these are building up to such a level indicative of some problem that we are overlooking?
Any advice would be greatly received!