Event ID - 1031

Event Id1031
Description"One of the System Attendants task is blocked. Function: %1"
Event InformationAccording to Microsoft:

One of the Exchange System Attendant tasks has been blocked. The System Attendant has been taking too long to perform some task.
User Action :
This can be caused by a variety of problems.
Look for other alerts that will provide a clearer idea of the problem such as failures in Mail Flow or MAPI logon or failure of database maintenance to run.
If this is followed by an Event 1032, then the task has recovered by itself. If these events occur regularly, the server is probably experiencing severe performance issues. If there is no 1032 following it, then the administrator should test different functionality of the System Attendant (recipient policies, OAB generation, mailbox cleanup, etc.) to see if any of them are not working properly.
Reference LinksError code 0x80040301 appears when you try to move a mailbox in Exchange Server 2003

One of the System Attendants task is blocked.

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