We are designing a Dynamics 365 solution for a customer that already have an existing tenant with an Azure AD that uses federation through AD-FS.
We would like to design a solution using a separate tenant and Azure AD with Dynamics 365 (online). The idea would then be that we should invite users from their tenant to "our" tenant using Azure AD B2B.
We've found that there are limitations using Unified Service Desk client and using the users own email, using this approach. Are there other known limitations?
Could this be solved in a better way, still using two separate tenants?