I have a win2k3 STD server (DC) and Win2k3 Ent(ADC) .. All the time DNS log is giving an error like 216a8af9-ace6-43fb-9a50-8e7422da4b4c._msdcs.xxx.com - domain cann't resolved. This specific domain nameis coming under Forward lookup zone -> domainname->_msdcs-> doamins and a corresponding entry is coming in cname. DNS giving an Event ID 2088. While checking, I can find out the similar entry - 216a8af9-ace6-43fb-9a50-8e7422da4b4c._msdcs.xxx.com Local (server)- is there in SMTP Default virtual server ->domain. I tried to delete this ..but there is no delete option available for this. Kindly let me know how to resolve this issue... Thanks in advance..