Hello, I am having an issue with my Exchange server after a SP3 installation. Any help would be appreciated. I have a single Exchange Server 2007 installed on a Windows 2008 x64 server. I just installed SP3 and Update rollup 2 for Exchange Server 2007 SP3. After the reboot - email and OWA access is unavailable - The Mail store cannot be mounted. - The MS Exchange Information Store will not start. When I check the event viewer I get the following error messages. - Source IIS-W3SVC-WP - Event ID: 2268 - Description: Could not load all ISAPI filters for site 'DEFAULT WEB SITE'. Therefore site startup aborted. And - Source IIS-W3SVC-WP - Event ID: 2214 - Description: The HTTP Filter DLL C:\Program Files\Microsoft\Exchange Server\ClientAccess\owa\auth\owaauth.dll failed to load. The data is the error. When I open Exchange Management Console I get the following messages: -------------------------------------------------------- Microsoft Exchange Warning -------------------------------------------------------- The following warning(s) were reported while loading topology information: Get-ActiveSyncVirtualDirectory Completed Warning: Extended protection has not been enabled. Install the operating system update specified in KB968389 onto server " MAILSERVER.domain.net " and try again. System.Runtime.InteropServices.COMException (0x80070003): The system cannot find the path specified. at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_Parent() at Microsoft.Exchange.Management.SystemConfigurationTasks.ExtendedProtection.LoadFromMetabase(ExchangeVirtualDirectory exchangeVirtualDirectory, Task task) at Microsoft.Exchange.Management.SystemConfigurationTasks.MobileSyncVirtualDirectoryHelper.ReadFromMetabase(ADMobileVirtualDirectory vdirObject, Task task) get-MailboxDatabase Completed Warning: (This message was repeated 4 times – shortened to save space) ERROR: Could not connect to the Microsoft Exchange Information Store service on server MAILSERVER.domain.net. One of the following problems may be occurring: 1- The Microsoft Exchange Information Store service is not running. 2- There is no network connectivity to server MAILSERVER.domain.net. 3- You do not have sufficient permissions to perform this command. The following permissions are required to perform this command: Exchange View-Only Administrator and local administrators group for the target server. 4- Credentials have been cached for an unpriviledged user. Try removing the entry for this server from Stored User Names and Passwords. get-PublicFolderDatabase Completed Warning: ERROR: Could not connect to the Microsoft Exchange Information Store service on server MAILSERVER.domain.net. One of the following problems may be occurring: 1- The Microsoft Exchange Information Store service is not running. 2- There is no network connectivity to server MAILSERVER.domain.net. 3- You do not have sufficient permissions to perform this command. The following permissions are required to perform this command: Exchange View-Only Administrator and local administrators group for the target server. 4- Credentials have been cached for an unpriviledged user. Try removing the entry for this server from Stored User Names and Passwords. -------------------------------------------------------- OK -------------------------------------------------------- Ive tried many things that I found on technet and the internet without success. Any suggestions on how to trouble shot the problem would be appreciated. Thank you in advance.

This appears to be a known issue after installing sp3 ru2. Here is the current thread that is under investigation by MS. Try some of the workarounds posted here. http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/80e3b96d-0f17-4ead-92ab-9875cc663ef3James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com