Hi @gachowski , thanks for the response . Just few days back we had setup this test lab, we are enrolling Mac with URL based ( /enroll ). We have not installed any OS in client Mac as these are new Macs. This issue is not only with one client, I had checked with 3 clients but issue is the same for all. So we are suspecting issue with some settings in server itself but not sure. Please let me know if you need any more details.
I would try the setting under "User-Initiated Enrollment" .. are the certs set up like you want? is the management account password match the password rules? I usually start with a short fake user and password for testing.
Also is one of the accounts the root account? Apple the past few OS have had a hard time getting that work correctly. I would leave that un-enable (factory default) while testing.