Dear All,Please help me to solve this issuse .I have a Exchange 2007 server, it was working fine with us last days . today i was open the the mmc of ActiveDirectory users and compurts , giving the error message Microsoft Visual C++ Runtime Library. please look below the error logs generated in Event Viewer.Faulting application mmc.exe, version 6.0.6001.18000, time stamp 0x47919524, faulting module msvcrt.dll, version 7.0.6001.18000, time stamp 0x4791ad6b, exception code 0x40000015, fault offset 0x0000000000029b06, process id 0xed8, application start time 0x01ca5abeab744b0d. Thanks Pradeep

Looks like this is a process crash issue and you need to dedug the related crash dump file. Please get in touch with PSS on the numbers http://support.microsoft.com/default.aspx?scid=fh;EN-US;PHONENUMBERSfor proper investigation of the dump file.Raj

Take a look at Salvador Manaois III's answer: MMC error on windows server 2008http://social.technet.microsoft.com/Forums/en-US/winserverDS/thread/1eb440ab-af37-4954-9fe8-23ec75132a31MCTS: Messaging | MCSE: S+M | Small Business Specialist

I recommend you to post the issue in Forum for Windows Server. http://social.technet.microsoft.com/Forums/en-US/category/windowsserver Besides, personally, you may try the follow method. 1. Regsver32 msvcrt.dll 2. Try to rename msvcrt.dll to msvcrt.bak and added new msvcrt.dll with the same version and then register it. 3. Also you can open %APPDATA%\Microsoft\MMC and then delete DSSITE.MSC. Try to open AD Sites and Services from start -- administrative tools and start -- run -- dssite.msc Regards, Xiu