Likewise this has started for us just recently, we've been enrolling Enterprise devices for nearly a year and suddenly this starts happening.
Android v8
Samsung S9
SaaS v1903
Hub app v1903
Managed Google/Play Account
However it only occurs occasionally, like maybe 1 or 2 out of 10 will do it.
Hi guys.
I faced the same problem. But in my case I was using a Staging account. When about 50 devices have been configured with the same account (Staging account), then the problem happened "Failed to register google account. Please enroll again." I fixed the problema criating a new account for Staging but the same problem occurred with about 50 device configured.
I find in the Google Documention that exist a limit of 50 devices per user registration. link: https://developers.google.com/identity/protocols/oauth2
Then I modify the registration method from the user-based for device-based on Devices Settings> Devices & Users> Android> Android EMM Registration> Enrollment Settings -> DEVICE-BASED. This take time to work (5 minutes).
Now its possible to enroll more device with the same account because the generated Google account on the device is unique to each device enrolled by the same enrollment user.
I hope this information is useful.
Sorry for my English, Im learning.