Exchange server 2016 global address list not updating
Any time you run into an Exchange Global Address List issue, the first place to investigate is the application event logs on the Exchange server that is generating your offline address book (OAB).
For me, new colleagues are not showing up and the contact pictures aren’t displaying either.You should also check that all four sites can communicate on port 25, in order to allow replication traffic to pass through.The easiest way to test this is to use an old Microsoft tool known as They do for my colleague sitting next to me, so I don’t think it is a server misconfiguration or something like that.
Is there any way I can force a manual update of the Offline Address Book (OAB) in Outlook or reset it completely otherwise?
Choosing the option to Download the Address book should have had no effect on the nickname files. If I access Outlook 2010 I see the full internal address list (GAL??