Sign in to Microsoft 365 Admin Center → https://admin.microsoft.com.
Go to Groups → Active Groups.
Select the Microsoft 365 Group you want.
Click Members → View all and manage members.
Click Add members.
Enter the external email address (e.g. user@gmail.com).
user@gmail.com
If the user is not already in your tenant, Microsoft will create a Guest account for them.
Click Save.
The guest will receive an invitation email to join.
Last updated 5 months ago