
Explanation:
Portals: Microsoft 365 admin center and Exchange admin center
Groups: Group2 only
Creating a contact (mail contact)
A contact (also called a mail contact) is an Exchange object. Microsoft documentation states that mail contacts are created and managed using Exchange-related admin experiences.
The Exchange admin center explicitly supports creating and managing mail contacts.
The Microsoft 365 admin center provides a simplified interface that also allows admins to create contacts (which are stored in Exchange Online).
Therefore, the two correct portals that can be used to create Contact1 are:
Microsoft 365 admin center
Exchange admin center
Other portals are incorrect:
Microsoft Entra admin center manages users, groups, and devices, but does not support creating mail contacts.
Microsoft Intune admin center is for device and app management only.
Adding a contact to a group
Microsoft documentation clearly differentiates which group types can contain contacts:
Distribution groups support adding mail-enabled objects, including:
Mail users
Mail contacts
Security groups do not support mail contacts.
Microsoft 365 groups only support user mailboxes and do not support contacts.