Dear all, following problem: we have one organization and in this organization are many suborganizations: A (exchange) B (administrative Group) C (administrative Group) D (administrative Group) . .now the problem is, when users in Organization D are working in Cache Mode with Outlook the OAB is not up to date...when the cache mode is disabled, the address book looks good...weve done some things:1.) Cache modus deactivated2.) deleted ALL *.oab and *.ost files3.) started Outlook without cache mode (everything is working fine)4.) activated cache Modus (the same issue, OAB is not correct)butin organization B and C all the things are working correctly with cache mode...can someone give me a hint, how i can resolve this issue?thx in advancerichard

Do you get any error in application log of an OAB generation Exchange Server related to OAB?Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

no errors in the logs...

I would also check if the Oab all versions are replicated to D (administrative Group). coz in online mode the OL clients directly pull GC in order to browse the GAL. so please make sure if replicas are properly set for above mentioned foldersVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

all OAB Versions are replicated...also the DC in the Side D is a GC...no errors in the eventlog on the DC

I would ask you to take a look @ below article. Offline Address Book - Best Practice http://www.msexchange.org/tutorials/Offline-Address-Book-Best-Practice.html please check the event logs on Offline Adress Book Server and of possible enable the diagonostic logging on the sameVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi,Please check whether the Mailbox Store associated with the Offline Address Book.For more information, please refer to the below article:http://support.microsoft.com/default.aspx?scid=kb;EN-US;905813ThanksAllen

Dear all,thx for help...i rebuild the OAB and now no problem...regards