We migrated the MS Exchange 2003 to MS Exchange 2007. And the original public folder is migrated and host in the CAS server instead of the mailbox server. The below error messenge is shown every 25 mins in the CCR mailbox server"Error initializing session for virtual machine EX2K7VS. The error number is 0x80004005. Make sure Microsoft Exchange Store is running. Also, make sure that there is a valid public folder database on the Exchange server" I have read many papers regarding this error messenge but mostly they are focuing in MS Exchange 2003. What I can do to isolate this error?

Well right now i´m facing this problem, what i have found is that Folder Hierarchy on adsiedit is not placed on the correct path, check this linkhttp://msexchangetips.blogspot.com/2006/08/exchange-esm-missing-public-folder.htmli followed the instructions however problem continues, tomorrow i will delete the database and Public Folder Database to start again.hope this helpCapecolMCSA - MCTS Exchange Server 2007 - 2010

Well little more digging i founded this thread http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_24552379.html this is the same like the post before however there is an attribute that was not mentioned in the post above..so follow the directions and problem will be resolve...don´t forget to restart the information store.i didn´t delete the PF folders.CapecolMCSA - MCTS Exchange Server 2007 - 2010

Install E2K7 SP2 and Roll up 1 Exchange Server 2007 Service Pack 2 http://www.microsoft.com/downloads/details.aspx?FamilyID=4C4BD2A3-5E50-42B0-8BBB-2CC9AFE3216A&displaylang=en Description of Update Rollup 1 for Exchange Server 2007 Service Pack 2 http://support.microsoft.com/Default.aspx?kbid=971534 Update Rollup 1 for Exchange Server 2007 Service Pack 2 (KB971534) http://www.microsoft.com/downloads/details.aspx?FamilyID=de91f994-6263-47ef-89d7-6d344997459d&displaylang=en