Outlook Integration Error

When you try to log on to Microsoft Office Communicator 2007, you receive the following error message:

Outlook Integration Error

For more, when you click the message to display the details, you receive the following error message:

There was a problem connecting to Microsoft Office Outlook. The e-mail address used in your default Outlook profile is different from the sign-in address used in Communicator. Change your default Outlook profile to match the sign-in address you are using in Communicator, and then sign out and sign back in to Communicator.

Resolution :

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.

For more refer to

http://support.microsoft.com/kb/951644