Microsoft 365 SSO stopped working with v18 update 7

[paulsummers]

Self-hosted enterprise v18 update 7- following the update Microsoft SSO for both admin and web client has stopped working. Logged-in web client users are fine; new users and those that 'exit' the web client now receive a HTTP error 500, unable to handle this request on the URL https://*****.3cx.co.uk/webclient/signin/microsoft?jwt=true&ngsw-bypass

No change has been made to the Azure app or 3cx admin Microsoft 365 setting - and no obvious issue in logs/3CX admin.

 

[Charles_3CX]

Can you please check under the OS of the machine via SSH for a hidden folder called .dotnet found under /var/lib/3cxpbx/

You can use

cd /var/lib/3cxpbx/

Then issue the command.

ls -al

 

[paulsummers]

Yes, I see a .dotnet folder.

 

[Charles_3CX]

Please delete the contents folder with the following command:

Ensure you have a full backup from the system downloaded to a safe location.

Then issue the following command:

rm -rf /var/lib/3cxpbx/.dotnet/corefx/cryptography/x509stores/ca/*

Then restart the machine and check if you can log in using the MS SSO.

 

[paulsummers]

This has resolved the issue, thanks.

 

[Charles_3CX]

You are welcome.