gsuite mobile device activation fails

[southhamster]

Hello all, we are a gsuite for education school integrated with RM UNify but have come across an odd problem.

We have 1 user whose Huawei LY-9 phone has been enrolled in gsuite MDM for some months with no problem.

However, she has had repeated messages to enroll her device and each time we authorise it in the admin console, she tries to enroll but it fails again and then gets the same message.

She can login to her account ok on a PC, password is ok she and insists that she hasn't changed or upgraded anything.

Any ideas before I raise a call with Google?