Ticket: Exchange 2003 - Deleting this mailbox store may result in the loss of system messages used by Exchange

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When does the System Attendant mailbox get created? Can it be moved or re-created?

The System Attendant mailbox is created when the system attendant is created on a server. It is associated with the first mailbox store created on a server.
If an attempt is made to delete the mailbox store containing the System Attendant mailbox, the following warning will appear:

Deleting this mailbox store may result in the loss of system messages used by Exchange, such as Free/Busy or Key Management Security. If you choose to continue, you need to restart the system attendant service after the store is deleted.

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If the store is then deleted, the System Attendant mailbox will be moved automatically into another mailbox store on the server, that is, the HomeMDB value on the directory object will be updated.

The system attendant service must be restarted to reconfigure MSExchangeFBPublish to use the new mailbox location, and the mailbox object may not reappear under the Mailboxes node of Exchange System Manager until it is used in the future.
If there is a System Attendant directory object but no mailbox object, the mailbox store object will be re-created automatically in the mailbox store referenced by the HomeMDB attribute as soon as it is needed. Note that one cause of this is using a blank store for troubleshooting.

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步驟:

1. 您可以移除First  Storage Group 的 mailbox store

2. 當出現下列訊息時繼續刪除

Deleting this mailbox store may result in the loss of system messages used by Exchange, such as Free/Busy or Key Management Security. If you choose to continue, you need to restart the system attendant service after the store is deleted.

3. 刪除後直接重新啟動Exchange System Attendant Service 即可

4. Event ID 會有警告資訊提醒您要重啟service, 以重新配置 System Attendant 這個信箱的mailbox store

Microsoft Exchange System Attendant has detected that the system attendant object in the DS has been modified. System Attendant needs to restart the Microsoft Exchange Free Busy Publishing Service.

 

Blog Extended Reading

More Information & Reference
Overview of Exchange 2000 Server and Exchange Server 2003 Special Mailboxes


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