I upgraded my T22P to the latest 7.73.0.50 firmware. Provisioning with basic authentication fails. My server sends 401 UNAUTHORIZED at the first request but the phone keeps requesting with no credentials.
I downgraded to 7.72.0.80 and it's fine.
Would you please tell me how do you provisioning the phones? RPS server or other server? Do you use the https?
You can go to web interface->secuity->Trusted Certificates->Only Accept Trusted Certificates, then disable it and test again.
I'm not using RPS. Provisioning is http with basic auth.
Do you disable the Only Trusted Certificates then test again?
If it still can't work, please help us to get the syslog(level=6) from the 7.73.0.50 version and 7.72.0.80 version.
We check something from the syslog file.
BTW, how many phones do you have?