Communicator 2007: "Outlook Integration Error"

When you try to log on to Communicator 2007 you might get a error "Outlook Integration Error" and you might not be able to login to the communicator successfully.

To fix this problem,

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then press ENTER.
3. Locate and then right-click the following registry subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator

4. Point to New, and then click DWORD Value.
5. Type DisableEmailComparisonCheck as the name of new registry entry, and then press ENTER.
6. Double-click DisableEmailComparisonCheck, type 1 in the Value data box, and then click OK.
7. Exit Registry Editor.
8. Restart the Office Communicator and login