Update Address Book in Outlook (PC)
- Send/Receive>
- Send/Receive Groups->
- Download Address Book…

You can manually update your OAB rather than to wait 24 hours.
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.
Sources:
Estimated Time to complete:
~10 minutes (T1+)
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