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Hello Everyone
I have 2 CAS servers and 2 MBX servers , after renewing the expired SSL certificate on both of CAS , i had a problem with users who use protocol IMAP to connect , applications who send mails via IMAP and MAC users .
I found this errors with the following ID in booth of my CAS servers :
Schannel errors with s ID : 36888 , 36874 , 36887
I followed the link bellow and created the messing values :
https://kemptechnologies.com/blog/enabling-tls-1-2-on-exchange-server-2013-2016-part-1/
The problem remains the same ,
Would you help me please identify the problem
I have also found the following error :46 = TLS1_ALERT_CERTIFICATE_UNKNOWN
Hi @Anonymous ,
Good day!
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.
Regards,
Lou
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Hi @Anonymous ,
Do the suggestions above help? If the issue has been resolved, please click “Accept as answer” to mark helpful reply as an answer, this will make answer searching in the forum easier and be beneficial to other community members as well.
Regards,
Lou
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Hi @Anonymous ,
It has been a long time since last reply, did these suggestions help you? If the above suggestion helps, please click “Accept as answer” to mark helpful reply as an answer.Your action would be helpful to other users who encounter the same issue and read this thread.
Regards,
Lou
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