Hi All: The current exchange server setup is as follows: 1. Active Directory Server (Windows 2003 Enterprise Edition SP1) 2. Exchange Server (Exchange Server 2003 Enterrise Edition SP2 + Windows 2003 Enterprise Edition SP1) The Exchange Server and Active Directory Servers are different. Exchange Server is installed on a member server. Have installed RPC over HTTPs and this was working perfectly till a couple of days back. There are no configurations changes done to the Exchange Server or Active Directory Server. No events being logged in either of the servers. This is really strange as how does a perfectly working RPC over HTTPS stop functioning suddenly. Howover all the other functionalities of the server are working fine like OWA / POP / IMAP. Have also configured ActiveSync and OMA. Request you all kindly help me on this matter. Thanks & Regards Mitul Zaveri