With Unaric Availability & Contact Info (ACI), you can:
•Look up the Office 365 email address of a Contact or Lead
•See their Microsoft Teams presence (e.g. Available, Busy)
This works if the Contact's or Lead's company uses Microsoft 365.
You don't need a Microsoft 365 account yourself. The Contact or Lead must be part of a Microsoft 365 organisation and their organisation must not block presence lookups.