This is how I resolved this exact same problem for one of my users. He was getting this message everytime he started Outlook 2003 (not Outlook Express). I checked the identity number for his user account in the registry and found that it was *almost* correct in one place. 1. Start REGEDIT from the Run box. 2. Navigate to HKEY_CURRENT_USER\Identities 3. You should see a subkey under Identities, like this: {7E7DGDAF-79E4-4B7E-BFCB-04BB83E2A377} 4. Under this subkey you should find a string value called User ID. This value should be *exactly* the same as the afore-mentioned subkey name. In my case, the User ID value was almost the same, except it didn't have the brackets on each end like this: { and } so I added those brackets, started Outlook and never saw the message again.
