See the attached screenshots (in order). Last week our Exchange 2003 Enterprise (SP2) server rebooted. LSASS.exe faulted, and forced the winlogon.exe to reboot the machine. This is the first time it has happened. I am really trying to figure out what might cause this to happen. I called MS support and since our current support only works in break-fix mode we were not able to really troubleshoot. I know a lot of LSASS issues are related to virus/malware, and the machine has been scanned fine, no issues there. I am not sure if anyone else has seen this before. As much as I know "these things sometime happen with Windows servers" I don't have a lot of confidence that it won't happen again. Thanks.