Can you share some more information on "security related logs"?
As to me, there aren't specific "security related logs" in Exchange.
For example, if you are looking for sign-in failure attempts, you can check Event Viewer>Windows logs>Security for event 4625, or check IIS logs for the sign-in request.
IIS log location: C:\inetpub\logs\LogFiles\W3SVC1
If you are looking for admin audit log or mailbox audit log, you can refer to below links:
How to use administrator audit logging in Exchange Server
Mailbox audit logging in Exchange Server
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