To identify is simple, your password and the security questions will be changed and you no longer will further be able to use that particular account.
Whats more imp is, how to recover that account back.
Last Wiki Answer Submitted: June 19, 2012 1:48 pm by piyushagrawal95 pts.
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You can check the IIS logs for suspicious IP addresses accessing your CAS Server. C:inetpublogsLogFilesW3SVC1
If you think someone compromised an AD account, you have more to worry about then Exchange. Check the Domain Controller security logs for suspicious login failures.
If you are using SMTP, check the logs. There might also be a problem form the client side (Outlook). Track the message addresses by using Message Tracking.
Make sure you change all the passwords and restart the service.
Please do answer that…
environment would be exchange 2010 and outlook 2007
You can check the IIS logs for suspicious IP addresses accessing your CAS Server. C:inetpublogsLogFilesW3SVC1
If you think someone compromised an AD account, you have more to worry about then Exchange. Check the Domain Controller security logs for suspicious login failures.
If you are using SMTP, check the logs. There might also be a problem form the client side (Outlook). Track the message addresses by using Message Tracking.
Make sure you change all the passwords and restart the service.