I have an Exchange 5.5 (Build 2653.23: Service Pack 4) server on NT4 (SP6) which takes about 95% of the server's cpu almost all the time.
The application event viewer logs lots of this first event (1101 - error):
Error 0xfffffbd3 occurred on message <message_id>uring a background cleanup
then it logs a couple of 1104 (error) events :
Error 0xfffffbd3 occurred during a background cleanup on attachment <attachment_id>
Last, it logs a 7201 warning :
Background thread FDoPeriodic encountered a problem. Error code 0xfffffbd3
The only solution is to restart the server as the Store service doesn't answer to a stop request.
Thanks for help.