Questions on Office 365 Tenants integration

Hi Community,

One of our customer has the below environment:

Forest A 

• AD
• Citrix thin clients are installed.
• Office 365 enabled with Teams licenses (Tenant A)

Forest B 

• AD
• ADFS installed.
• SSO is enabled.
• Laptops are provided by vendor and those accounts are hosted in this AD.
• Office 365 enabled for Exchange mailboxes. (Tenant B)

The fact is that the end-users would be using the Citrix Virtual Desktop environment in a full-screen mode. So while Forest B / Tenant B does provide workplace services (like a mailbox) the end-users would not access those directly from their desktop session.

Requirement:

• As a Forest B user, the user should be able to log on to their laptop using Forest B’s AD credentials. (As they’ve SSO enabled they can access Tenant B mailboxes without entering the credentials again)
• Then the user would be able to log on to the Citrix session using Forest A credentials.
• User would be able to use Teams with Forest A / Tenant A credentials
• Then the user would be able to run an outlook fat client logging in using Forest B / Tenant B credentials.

Question

Teams and Outlook clients from different O365 tenants will create some issues and wanted to find out if such a scenario was supported?

Any pointers would be of great help.