login with one user to a device, which is registered to another domain in another tenant

New Contributor

There are two schools with a tenant each and by intune managed devices, also two different domains.


Goal is

to login with me@school1.de at a device, which is registered at school2.

And vice versa, login with me@school2.de at a device, registered in the school 1 tenant. 


Reason: teachers work in school 1 as well as school2 and do not want to use different logins.

Is there a way to manage this?



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