Two users Microsoft 365 groups synchronization in User Group Synchronization Plugin

Hi everyone,

I've got a problem with a client which wants to activate MFA Microsoft 365 login but there is external users:
Main users @domain1.ch
External users @domain2.ch
So I asked the IT team which is in charge of @domain1.ch Microsoft tenant to create 2 applications Azure (one for Azure group sync and one for the federated authentification), it is working fine.
But for the @domain2.ch which is managed by another IT company I asked them too to create the two Azure applications (one for Azure group sync and one for the federated authentification) but I cannot add a second "User Group Synchronization Plugin" in the "Advanced Vault Settings" to synchronize the external users. So how can we manage that, I mean synchronize two Azure AD groups from two different Microsoft tenants and set the federated authentification oAuth for both Microsoft tenants ?

Thanks,
Sylvain