You receive error number c1034a9e when you try to delete a mailbox store on an Exchange server

When you try to delete a Microsoft Exchange mailbox store from a server that is running Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003, you may receive an error message that resembles the following error message:

This issue occurs if a Site Replication Service (SRS) mailbox is homed on the mailbox store that you want to delete. You cannot delete a mailbox store if an SRS mailbox is homed on that mailbox store.

To resolve this issue, you must move the SRS mailbox to another database on the same Exchange server, test SRS replication, and then delete the first mailbox store. To do this, follow these steps.

Step one: Move all mailboxes to another mailbox store

Before you delete the mailbox store, you must make sure that all the mailboxes in that mailbox store are moved to another mailbox store on the same server, or that the mailboxes are moved to another Exchange server. If all the mailboxes are not removed from the mailbox store that you want to delete, you may receive error c1034a7f when you try to delete the mailbox store. For additional information about error c1034a7f and for step-by-step directions about how to identify mailboxes that are in the mailbox store, click the following article number to view the article in the Microsoft Knowledge Base:

Step two: Move the SRS mailbox to another mailbox store on the same Exchange server

Warning If you use the ADSI Edit snap-in, the LDP utility, or any other LDAP version 3 client, and you incorrectly modify the attributes of Active Directory objects, you can cause serious problems. These problems may require you to reinstall Microsoft Windows 2000 Server, Microsoft Windows Server 2003, Microsoft Exchange 2000 Server, Microsoft Exchange Server 2003, or both Windows and Exchange. Microsoft cannot guarantee that problems that occur if you incorrectly modify Active Directory object attributes can be solved. Modify these attributes at your own risk. Use the ADSI Edit snap-in to find the distinguished name of the destination mailbox store that you want to move the SRS mailbox to, and then configure the Microsoft DSA object to use the new mailbox store.

The ADSI Edit snap-in is included in Microsoft Windows 2000 Support Tools.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

To move the SRS mailbox to another mailbox store on the same Exchange server, follow these steps:

1. Start the ADSI Edit snap-in, and then locate the mailbox store that you want to move the SRS to.
2. Right-click the mailbox object, and then click Properties.
3. On the Attributes tab, click Both in the Select which properties to view list.
4. In the Select a property to view list, click distinguishedName.
5. In the Value(s) box, click the space before the first character.
6. Press SHIFT + END to select the text in the Value(s) box.
7. Press CTRL + C to copy the text in the Value(s) box.
8. In the ADSI Edit snap-in, locate the Microsoft DSA object. The following is the distinguished name of the Microsoft DSA object:
   CN=Microsoft DSA,CN=Your Server Name,CN=Servers,CN=Your Administrative Group Name, CN=Administrative Groups,CN=Your Organization Name,CN=Microsoft Exchange, CN=Services,CN=Configuration,DC=Your Domain Name, DC=Your Domain Name
9. Right-click Microsoft DSA, and then click Properties.
10. On the Attributes tab, click Both in the Select which properties to view list.
11. In the Select a property to view list, click HomeMDB.
12. Click inside the Value(s) box, and then click CTRL + V to paste the distinguished name of the destination mailbox store.
13. Click OK.
14. In Administrative Tools, open Services.
15. In Services, right-click Microsoft Exchange Site Replication Service, and then click Stop. Wait for the service to stop.
16. Right-click Microsoft Exchange Site Replication Service, and then click Start. Wait for the service to start.
17. In ADSI Edit, locate your destination mailbox object.
18. Right-click your destination mailbox object, and then click Properties.
19. On the Attributes tab, click Both in the Select which properties to view list.
20. In the Select a property to view list, click HomeMDB.
21. In the Value(s) box, confirm that the distinguished name of the Microsoft DSA object is present.

Step three: Test SRS replication with Exchange 5.5

Before you delete the old mailbox store, you must test SRS replication with Exchange 5.5. To do this, follow these steps:

1. Create a mailbox on a computer that is running Microsoft Exchange Server 5.5.
2. Force the replication.
3. Use the LDP utility on port 379 to verify that the Microsoft DSA object is present in the SRS database.

If the SRS replication test is successful, you can delete the old mailbox store.

The Site Replication Service (SRS) is designed to provide directory interoperability between Exchange Server 5.5 and Exchange 2000 Server. SRS is built and runs on an Exchange 2000 server. SRS is essentially a modified Exchange Server 5.5 directory. SRS uses Lightweight Directory Access Protocol to communicate to both the Active Directory directory service and the Exchange Server 5.5 directory. To Exchange 5.5 servers, the SRS appears similar to another Exchange 5.5 server that behaves like a configuration and recipients replication partner.

A distinguished name is a name that uniquely identifies an object by using the relative distinguished name for the object plus the names of container objects and domains that contain the object. The distinguished name identifies the object and the location of the object in a tree. Every object in Active Directory has a distinguished name. For example, the following may be the distinguished name of your destination mailbox store: