Forum Discussion
Suspicious events
Exchange 2016 fully patched. Saw a few errors in Application log. Source: MSExchange Front End HTTP Proxy [Owa] An internal server error occurred. The unhandled exception was: System.ArgumentEx...
Same here, our ISP told us they detected activity suggesting compromise yet we have been testing at least weekly with defender scans and have nothing. All mitigations applied and no evidence has been found of exploitation on our end.
good that you are'nt finding any threats. hope you've ran the testproxylogon.ps1 script released by microsoft.