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How can I force Global Address Book to update in Exchange 2010

Posted on 2014-12-03
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Last Modified: 2014-12-03
Exchange 2010 Enterprise SP2 (CAS and mailbox roles on separate servers), Outlook 2007:  When modifying a user's setting in AD (for example adding/changing a title), it's not reflected in the GAL (Outlook) for at least 48 hours.  We have our client settings with cached mode turned on.  I see the GAL/OAB is set to update daily at 5:00 am.  Is this normal behavior for this to take so long to update?  I've read through some forums and see it could take up to 24 hours.  I came from an Exchange 2007 environment previously, and it seemed to update quicker.
thank you for your assistance.
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Question by:trinity2007
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tshearon earned 500 total points
ID: 40478575
After the OAB gets updated on Exchange it still needs to be distributed to the web services first. The process of updating and distributing the OAB is done on two schedules. They are the OAB Update schedule and the OAB Distribution schedule. So due to various default synching schedules it could take up to 48 hours as you are seeing. This is normal.

You can either change the schedules or force the distribution. To change the OAB Update Schedule via the Exchange Management Console: Organization Configuration-> Mailbox-> tab Offline Address Book-> double click on the Offline Address Book for which you want to change the schedule-> tab General.

To set the OAB distribution polling schedule via the Exchange Management Console:
Server Organization-> Client Access-> select the server for which you want to change the schedule-> bottom section: tab Offline Address Book Distribution-> double click on the name of the OAB-> tab General.

You can force an update and redistribution as well. To update the Offline Address via the Exchange Management Console: Organization Configuration-> Mailbox-> tab Offline Address Book-> right click on the Offline Address Book for which you want to update-> Update.

To force the distribution of the OAB files use the Update-FileDistributionService PowerShell command for the Exchange Management Shell:

Update-FileDistributionService "<your_cas_server>" -Type "OAB"
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by:trinity2007
ID: 40478846
I didn't realize the two schedules were separate.  Now I understand why it takes a little longer.

thank you for the explanation...helps a lot!!
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