Solved The SSL connection could not be established, see inner exception.

[kdebie]

Hi all

I'm facing an issue on one of the 3CX systems we manage. This is a system with a custom FQDN.
In the 3cxmanagementconsole.log file I see the following error :

System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid because of errors in the certificate chain: NotTimeValid

Certificate is still valid.
I'm setting up the M365 integration but I'm facing issues with that. I believe it's related to this message.
I already replaced the certificate but that didn't resolve the issue.

If I check from the debian host to reach login.microsoft.com I'm getting an 200 OK message.

$ curl -I https://login.microsoftonline.com
HTTP/2 200

We are accessing 3CX on poort 5001. There're no firewall restrictions on this port.

Any ideas?

 

[Charles_3CX]

Kindly follow the steps below and let us know if the issue is still there:

• Create a full backup of the PBX and keep it in a safe location for security reasons.
• Connect via an SSH terminal; search for the following.

/var/lib/3cxpbx/.dotnet/corefx/cryptography/x509stores/ca

• Delete or move any .pfx certificates that are found under this location.
• Then check the M365 integration and let us know.

 

[kdebie]

Nice, that fixed it. Thanks!

 

[Charles_3CX]

You are welcome.