This article was previously published under Q271335
After you move a Microsoft Exchange 2000 Server computer or a Microsoft Exchange Server 2003 computer from one organizational unit to another within the domain, or after you rename the organizational unit, the following events are logged in the application event log:
Event ID: 9186 Source: MSExchangeSA Type: Warning Category: General Description: Microsoft Exchange System Attendant has detected that the local computer is not a member of group 'cn=Exchange Domain Servers,cn=Users,dc=microsoft,dc=com'. System Attendant is going to add the local computer into the group. The current members of the group are 'CN=SERVERNAME,OU=NEWOU,DC=microsoft,DC=com; '.
Event ID: 9187 Source: MSExchangeSA Type: Error Category: General Description: Microsoft Exchange System Attendant failed to add the local computer as a member of the DS group object 'cn=Exchange Domain Servers,cn=Users,dc=microsoft,dc=com'. Please stop all the Microsoft Exchange services, add the local computer into the group manually and restart all the services.
These events are logged even though the Exchange Server computer is a member of the Exchange Domain Servers group.
This issue may occur if the following condition is true:
The Exchange Server computer's distinguished name has been changed. When System Attendant starts, it caches the distinguished name of the local computer. The Exchange Server computer's distinguished name changes when it is moved from one organizational unit to another organizational unit. The new distinguished name is different from the distinguished name that is in the cache. Therefore, System Attendant logs event ID 9186 and 9187 messages.
To resolve this issue, use the appropriate method.
Restart System Attendant to refresh the cached value.
Note You must restart the following services that depend on the System Attendant service:
Microsoft Exchange Information Store
Microsoft Exchange Message Transfer Agent (MTA) Stacks
Microsoft Exchange Event
Microsoft Exchange Internet Message Access Protocol, Version 4rev1 (IMAP4)
Microsoft Exchange Post Office Protocol version 3 (POP3)
If your Exchange Server computer is not listed, follow these steps:
Remove the Exchange Server computer account from the Exchange Domain Servers group.
Add the Exchange Server computer account back.
Restart System Attendant.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
The machine account for the Exchange Server computer can be moved to an organizational unit other than Computers in Microsoft Active Directory directory service without any problems.