We currently have an old domain and a new domain within the same forest. We'd like to start migrating users from the old domain to the new, but we didn't want to disrupt their Office 365. I have read that since the two domains are within the same forest, this is possible. Does anyone know of any documentation for setting up Azure AD for seeing the new domain? Or will Azure AD connect simple replicate the new domain info in when the user is migrated?