Hi @Givary-MSFT
I managed to get a solution to the login problem, i had to add the custom domain verified in azure in my local active directory. This added logon alias with the custom domain.
Users are able to login to their synced machines using office365 credentials. We just have one remaining problem; the devices are not stepping from windows 10 pro to windows 10 enterprise as we expect the solution to work.
As illustrated in this article
https://learn.microsoft.com/en-us/windows/deployment/windows-10-subscription-activation
What further ways can we use to troubleshoot the windows 10 enterprise activation.