Hi,Since the last few weeks in a pure E2K7 environment several new problems have appeared:1. OOF no longer working from OWA or MAPI clients2. REsource Mailboxes stopped processing requests (they used to send email confirmations these have stopped working).testingautodiscovery and owa/oma/rpc over https all working as expected.using mfcmapi set the boolean value to true for oof - test showed this sends oof ok, when reversing the setting client reverts back to nooof.testing creating new mailbox in new storage group - same problem re-occurs.For Resource Mailboxes,created new room resource in new storage groupchecked auto-accept is set and is resource is true, setup meeting additional response message - testing shows no message sent confirming the booking, the calendar does have the booking but does not send a resource confirmation message.Im totally stuck as everything else works ok.NB.. These problems are for all users.Other:recently replaced our SAN certificate with a new SAN certificate (This all worked ok) may be related

Regarding OOF issue i would ask you to take a look @ below article and see if those things are configured. Problems with Exchange 2007 Out of Office Assistant in an Interop Environment and different versions ofOutlook. http://telnetport25.wordpress.com/2008/11/23/problems-with-exchange-2007-out-of-office-assistant-in-an-interop-environment-and-different-versions-of-outlook/ I would ask you to run the /Cleanfreebusy on those affected Resource mailboxes and also suggest you to take a look @ below article about same Managing Resource Mailboxes in Exchange Server 2007 http://www.msexchange.org/articles_tutorials/exchange-server-2007/management-administration/managing-resource-mailboxes-exchange-server-2007-part1.html Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi,Did you mean the OOF could not be configured in Outlook? You mentioned the OOF was working when changing the PR_OOF_STATE's value as True, but no oof when reversing the setting. How to understand this?Thank you for your clarifying on this issue.Allen