In the end-customer's Outlook, the changes of address list done inside Exchange are not propagated - e.g. he sees old user set instead of new user set.
Outlook has incorrect information in its cache, did not download the address list from server or the server has not refreshed the address lists.
On Exchange server, to refresh the address list:
PS> Get-AddressList | Update-AddressList
To force the Outlook client to download the address list:
Please follow the steps described in this article: http://www.clemson.edu/ccit/email_accounts/email/exchange/HowTo/OL_Download_GAL.html
To clear the cache:
- Close Outlook,
- Navigate to
- Remove the