We have a hybrid Office 365 deployment with federated domains.
We have our school's domain and we have a second domain for school leavers (alumni) that they will keep when they leave school.
Both domains are federated and I can assign the primary email address from either domain however they still have to login with their school username.
I would like add the alumni domain into our active directory so that I can change their username from fred.bloggs@school to fred.bloggs@almuni
I want them to logon with their alumni email address/username rather than with their old school username as I can see it causing confusion going forward if they have different usernames and email addresses. Hope that makes sense.
I've been reseraching adding second domains and child domains but I'm not sure the best way to achieve this.
In a nutshell: I want to be able to choose either the school domain or the alumni domain under User Logon Name in the Account tab for that user's details in Active Directory.
What's the best way of achieveing this?
Thanks in advance.