Jan 26 2018
is it possible to do device registration (and claims) across a forest trust?
it looks to me like it isnt possible due to the limitation of the Enable-AdfsDeviceRegistration -DeviceLocation command being "a domain within the same forest"
is there any other way to make this work cross forest? or is this a scenario for additional ADFS farms or moving to Azure AD registration and authentication?
(tagged ADFS 2016, its actually 2012 R2)
Mar 08 2018
Not sure if you found the answer to your question; basically registered devices are stored in a single location - which is the one you specify for -DeviceLocation.
This should not impact your cross-forest scenario. Unfortunately, as always with everything ADFS, documentation on not-too-standard deployments is thin...