An issue came up this week that I feel is worth making Exchange Admins aware of. The symptoms of the problem is transaction logs growing uncontrollably on the Exchange Server (as high as 1000 logs per an hour). However there is no growth encountered in the EDB or STM files. Obviously this resulted in log file drives filling up and larger than expected backups.
The problem is with the Entourage client and its interaction with the Exchange Server. Entourage utilizes httpdav to interact with the Exchange server. When a user attempts to send a message larger than the maximum message size limits, the message gets stuck in the user’s Entourage Outbox because Entourage was unable to handle the error returned from the Exchange server regarding the message size. Since the user set the Send/Receive schedule set, the client would continuously attempt to submit the same message to the server. The server would accept, process, and reject the message, resulting in the increase in the number of transaction logs.
Immediate Steps to take in this situation:
[Edit 01/04/05]: Adjusted immediate steps so they are clearer.