12800 Event solutions

12800 events indicate you are running out of memory.  For example:

Event Type: Error
Event Source: MSExchangeIS
Event Category: Content Engine 
Event ID: 12800
Date: 1/27/2012
Time: 9:47:14 AM
User: N/A
Computer: Contoso1
Description:
Message processing failed because there is not enough available memory (8007000E-80000000). 

 

There are three basic courses that troubleshooting can follow here:

 

The CalCheck tool has resolved a couple of these cases for me since it was released.  In these cases bad calendar items were blowing right through the limits that Exchange had imposed upon their conversion.  The conversion engine had only allocated a fixed amount of RAM and these items required more.  This caused the Out of Memory error to be reported.  When CalCheck examined these items it flagged them.  When the Administrator deleted them the 12800 events disappeared from the application logs of the Exchange Server.

 

Hopefully Randy's CalCheck tool will be equally effective for you if your server is encountering this event.  The tool should be good for locating bad calendar items whether you have the 9582 events or not.  In fact, once the bad calendar items are cleared out, it may lessen the 9582 events.  Just be careful not to assume that it will lessen or stop them.  The abbreviated steps I provided in the first bullet point are still your best bet if you are seeing 9582s.