Hi @MZ ,
Sorry but i can't understand the logs, if you could, please translate it into English. And share the General of these three (36888 , 36874 , 36887) events.
Only users using IMAP got this error? And what's the symptoms, like users couldn't login or something else?
And the application is a mobile app?
Forgive me about these stupid questions, and please share more details with me so i can better understand this issue and help you...
I think you can first check the IMAP settings with:
Get-ImapSettings | Format-List *ConnectionSettings,*Bindings,X509CertificateName
Make sure the certificate is right.
As for the error: 46 = TLS1_ALERT_CERTIFICATE_UNKNOWN
Since it's saying this error is a Certificate error, you can check the Bindings in IIS. Make sure the Https sites are using the correct cert.
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