Error message when you try to create a Public Folder database in Exchange Server 2007: �Exchange is unable to create a public folder tree�

When you try to create a Public Folder database in Microsoft Exchange Server 2007, the operation fails. Additionally, you receive the following error message in the New Public Folder Database Wizard in the Exchange Management Console:

This problem occurs when the value of the msExchPFTreeType attribute of the Public Folder tree object in the Active Directory directory service is not 1.

Note A value of 1 signifies a MAPI tree.

To resolve this problem, use the Active Directory Service Interfaces (ADSI) Edit snap-in to change the value of the msExchPFTreeType attribute to 1. To do this, follow these steps.

Note ADSI Edit is included with the Windows Server 2003 Support Tools. To install the Windows Server 2003 Support Tools, double-click Suptools.msi in the Support\Tools folder on the Windows Server 2003 CD.

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.

1. On a server that has the Windows Support Tools installed, open a command prompt.
2. Move to the "Program Files\Support Tools" folder.
3. Type adsiedit.msc, and then press ENTER.
4. On the Action menu, click Connect to.
5. In the Connection Settings dialog box, type a name for this connection in the Name box.
6. In the Connection Point area, click Select a well known Naming Context, and then click Domain in the box.
7. In the Computer area, click Select or type a domain or Server, and then type the fully qualified domain name (FQDN) of the server in the box. Or, you can click Default (Domain or Server that you logged in to) if it is appropriate.
8. Click OK.
9. In the navigation pane, expand Configuration [Server_Name.Domain_Name.Root_Domain], and then expand CN=Configuration,DC=Domain_Name ,DC=Root_Domain.
10. Expand CN=Services, expand CN=Microsoft Exchange, expand CN=Domain_Name, expand CN=Administrative Groups, expand CN=Exchange Administrative Group (FYDIBOHF23SPDLT), and then click CN=Folder Hierarchies.
11. In the details pane, right-click CN=Public Folders, and then click Properties.
12. In the Attributes list, click the msExchPFTreeType, and then click Edit.
13. In the Value box, type 1, and then click OK two times.
14. On the File menu, click Exit.
15. In the Services snap-in, restart the Microsoft Exchange Information Store service.
16. Create the Public Folder database in the Exchange Management Console again, and then mount the database. When the operation is complete, you receive the following information message:
    Summary: 2 item(s). 2 succeeded, 0 failed.
    
    Elapsed time: 00:00:03
    New Public Folder Database
    Completed
    
    Exchange Management Shell command completed:
    new-publicfolderdatabase -StorageGroup 'DC1\First Storage Group' -Name 'Public Folder Database' -EdbFilePath 'C:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group\Public Folder Database.edb'
    
    Elapsed Time: 00:00:01
    
    Mount Public Folder Database Completed Exchange Management Shell command completed: mount-database -Identity 'CN=Public Folder Database,CN=First Storage Group,CN=InformationStore,CN=DC1,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=Litware Inc,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=litwareinc,DC=com'
    
    Elapsed Time: 00:00:02

For more information about how to create a new Public Folder database, visit the following Microsoft Web site: