Dear All, I have restarted the Domain Controller after Windows Updates since then my DNS started troubling ultimately Exch 2007 was not working. DNS took time to replicate from other DNS server and it started working. I can send and receive emails now but on my Mail box server System Attendant service is not starting up. Pls help. Unexpected error The clocks on the client and server machines are skewed. ID no: 80090324 Microsoft Exchange System Attendant occurred. Thank you EXCH ADMIN

Make sure the clock in your system tray shows the same time/date for both the Exchange server and the Domain Controllers (taking time zones into account).

Thank you EXCH ADMIN

On Mon, 26 Sep 2011 12:55:35 +0000, EXCH ADMIN wrote: >Thank you A machine that's a domain member (as all Exchange servers are, with the exception of the Edge role -- and you can make even that role use the DC as a time source) should be synchronizing its clock with the PDC FSMO role in the domain. Have you checked your server's system event log to see if the W32Time is logging errors? --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP