Hi, I have uninstalled IIS and reinstalled without dismounting mailbox store and without stopping any exchange services. Now exchange is not working. All services are stopped and they are not comming up. Do any one have any suggestion....

Uninstalling IIS removes the metabase information required by Exchange. The two methods for resolving this are shown in the following KB article: http://support.microsoft.com/default.aspx/kb/841576 Tony www.activedir.org

Thanks for suggestion. My server is up and working. SMTP amd NNTP services was uninstalled. Have have installed these services and all is working well.