Hello and sorry for my englih. I did a removing of a DC and authority certificat server, his name was sop16. Now, in a other server who is also exchange 2010 server, i have this error : source : MSExchange SACL Watcher, ID :6003 SACL Watcher servicelet encountered an error while monitoring SACL change. Got error 1722 opening group policy on system sop16.sopab.fr in domain sopab. thanks for your help

Hi Have you removed it from AD completely? Removed from Sites and Services? In Exchange 2010 you can specify which DC that should be used, check the link below http://exchangeserverpro.com/how-to-use-a-specific-domain-controller-in-exchange-2010-management-shell Jonas Andersson | Microsoft Community Contributor Award 2011 | MCITP: EMA 2007/2010 | Blog: http://www.testlabs.se/blog | Follow me on twitter: jonand82

thanks for response, after reboot server, no msexchange SACL Watcher errors but other errors.....