Outlook 2016 global address list not updating cached mode
When I download the Offline Address Book again, the problem returns. This does show up in the event-logs of the Mailbox server that does OAB generation, but the logging generally isn't turned on high enough to tell you I've had this problem before - not for Exchange 2010 I will admit (it was Exchange 2003) but the symptoms were exactly the same, so with a bit of luck so is the solution.To make this more confusing, some users are able to see the conference room in the Global Address List without removing their offline address book. Unfortunately I never got to the bottom of it wasn't working, but I rebooted all of my Global Catalog servers and it magically started working again.When I look up the conference room in the Global Address List, it doesn't show up. So as I understood from our Sys Admin, the oab files are generated on one server, and rely on the file replication service on the global catalog servers (we have 2 of them) to copy the oab files to each of the servers.However, if I delete my files (Offline Address Book) then I can see the new conference room in the Global Address List. The service was not started on one of the servers and therefore some users were getting old oab's while other users were getting fresh copies. if you're having this issue, make sure the file replication service is started. Chances are good that OAB generation is failing for some reason.–For Instructions for Outlook 2007 –For Instructions for Outlook 2011 –For Common errors and troubleshooting Step 2: Uncheck the box next to Download changes since last Send/Receive.
If that's not it, check that LDAP Replication is fine.Instances of mail that is bounced back to the sender may also be fixed.Please use the steps below to update your Global Address Book.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.When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.
In this guide, the relevant timings are explained and instructions are given in how you can directly force an update and resync, which can be very handy when troubleshooting or when you work in an Exchange environment which sees a lot of user mailbox mutations.