I have this error in the event viewer under applications every 13 minutes. This problem seems to be losing connection from the AD server for a small period of time. I have searched the web with no luck. This is a 2003 DC and 2007 exchange that is up to date. any help would be appricated.

Try restarting your server and see if it goes away. If not tryswitchingmodes betweenmixed and native. Hope this helps.

I have restarted the server but after about an hour the errors started again. When you say switching modes do you mean the server 2003 or exchange 2007? I am in 2003 native mode. Not sure how to change mode in exchange.

Please post a full copy of the error from the event log. Be sure to change the name of the server and domain to protect yourself.

I have completed the 6th rollupand the error has gone away. Hope this helps anyone else with the same problem.