Exchange 2016 offline address list not updating
This situation however is extremely rare since the default maintenance time on Exchange is at AM and updates and downloads are usually performed during working hours.
Even though Outlook is the last in the chain, it is often the first level where the troubleshooting takes place as usually this is where the request is coming from.
This is called the Offline Address Book and is being generated on the Exchange server.
Something wrong with Schema update or did you mess up the infrastructure.
You can disable the option “Download changes since last Send/Receive” to make sure you get a complete fresh copy of the OAB but this could take longer to download.
The other day I was troubleshooting an issue where users were not able to download the Offline Address Book (OAB).
Use the Update-Offline Address Book cmdlet to update the offline address books (OABs) used by Microsoft Outlook clients.
For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax.
Is there any way I can force a manual update of the Offline Address Book (OAB) in Outlook or reset it completely otherwise?