Hi All: One of our clients is running Exchange 2003 SP2 in Shared Hosting Environment. The architecture includes the following # Active Directory Server (Windows 2003 SP2) (1 No.) # Exchange Server 2003 Enterprise Edition (SP2) (1 No.) # BES Server 4.1 (Windows 2003 SP2) (1 No.) Currently the requirements is to configure Exchange for Active Sync support to sync with iPhone and other Windows Mobile Devices. Active Sync is configured under Mobile Services in Exchange System Manager console. However whenever a user is trying to configure and connect the mobile device to the Exchange Server it is throwing the following error in the Event Viewer: ----------------------------------------------------------------- Event Type: Error Event Source: Server ActiveSync Event Category: None Event ID: 3005 Date: 9/15/2008 Time: 4:37:20 PM User: EXCH\Demouser Computer: EXCH001 Description: Unexpected Exchange mailbox Server error: Server: [exch001.exchange.com] User: [Demouser@xxxxxxx] HTTP status code: [501]. Verify that the Exchange mailbox Server is working correctly. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. ----------------------------------------------------------------- I have gone through the particular Microsoft article at http://support.microsoft.com/default.aspx?scid=kb;en-us;937635 which describes the same error. As a part of resolution we need to verify the existence of virtual directories as mentioned in the article. However I don't find the virtual directory Exchange-OMA in this setup which doesn't seem to be a default directory. Hence I am seeking answers for the following questions: # Should we create a Virtual Directory Exchange-OMA? # Is it Mandatory to support Active Sync? # Will it have any effect on Shared Exchange Setup? Just to add further Exchange-OMA virtual directory is created as a workaround as explained at http://support.microsoft.com/kb/817379 Thanks & Regards Mitul Z -- **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. NetMagic Solutions Pvt. Ltd. has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. NetMagic Solutions Pvt. Ltd. reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the NetMagic Solutions Pvt. Ltd.'s e-mail system. ***************** End of Disclaimer *******************