Add X500 Alias to Mailboxes with Old LegacyExchangeDN Value
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Copy/Extract the LegacyExchangeDN info from the NDR. This is located under the Generating Server portion. It looks like this:
•Replace +20 with a blank space.
•Replace +28 with an opening parenthesis character (.
•Replace +29 with a closing parenthesis character ).
- This can be performed on the server to apply a global fix. The real issue is stemming from the 'Type Ahead' cache in the users Outlook/Outlook Web App. They can easily clear out the cache completely OR delete the type ahead address as they are entering it and reselect from the address book..