Multi-tenant management added to admin portal

Feature Update: ezeep admins who are managing several organizations can simply switch between them by selecting their organization name and selecting another one. Thanks to multitenancy, Managed Service Providers can easily manage and switch between ezeep customers.

Import of Azure AD groups added to the admin portal.

Feature Update: Azure AD groups can be imported directly from the Add group button in Users & Groups. This increases the usability for Azure AD-connected ezeep organizations.