Exchange 2010 OAB won't update properly

By default Outlook will only try and download the OAB once every 24 hours (it normally checks the next day when you start it up)

Exchange generates the OAB once every 24 hours, normally at 4/5 AM and then the CAS will try and copy it every 8 hours by default. So it might only be on your CAS by 12/1 PM so outlook will only see this update the next day if it checked already in the morning.

So you can get a 48 hour delay from when something is changed in the GAL to when you actually see it in Outlook.

You can speed this up though. By doing a get-offlineaddressbook | update-offlineaddressbook then  restarting the msExchangeFds service on the CAS and then forcing Outlook to do a manual OAB download.

Are you seeing OAB changes within 48 hours on Outlook? If so, that's normal.

I have been manually updating it in the EMC...

It should be updating on the clients when I tell it to download, but it's not.

Ok, so you are saying, no matter what I do, I HAVE to restart the services if I want to manually update the OAB, otherwise I have to wait until the normal interval?  (which is set to 5am)?

I just migrated from Exchange 2003 and if the OAB works this way, it seems like a downgrade..

Is it updating on the clients at all?

Not unless I restart those services.

I have not 'waited 48 hours' since I rebuilt this latest OAB though.......

Well, exchange 2003 updated the OAB, once every 24 hours, usually at 4am and then outlook clients could download it, so you were looking at a 24 hour delay at least.

You can adjust the OAB polling interval on the CAS down from 8 hours to 1, so that if the OAB is generated at 4/5AM then it should be on your CAS by 5/6AM ready for clients to download when they turn on their PCs at 9am

Do you have multiple Offline address book?

YOur Exchange 2010 migrated Exchange 2003 and default OAB is in Exchange 2010 or Exchange 2003

Last but imp : have to set OAB on every database client settings on Database property page last tab?

I don't have multiple OAB's, no..

MegaNuk, I will try adjusting that and see what happens.. right now it's set for 5am.. so when I go in tomorrow and load up Outlook at 9am, it should be updated??

Yes, if you adjust your polling interval down to 1 hour then outlook should download the OAB that was generated at 5am that morning

Ok, I believe it's working now, if I just have some patience and wait..  I am doing one more confirmation test and I will check back in tomorrow.

Ok

Appears to be working now, if I just leave it alone and let it do it's thing..

Thanks for the update and points, don't forget you can actually manually force the OAB update through.