How to invite an external user to a Microsoft 365 Group

The way you invite an external user to a Microsoft 365 Group differs on whether the Group was created from Teams or other Microsoft 365 assets.

Scenario 1: Microsoft Group created from Teams

If you created a Microsoft 365 Group from Teams, by creating a Team, then the only way for you to add external users would be from Teams. Please reference this post for step-by-step instructions on how to do so.

Scenario 2: Microsoft Group created from locations other than Teams

If you created your Microsoft 365 group from SharePoint, Planner, Outlook, or any other location (other than Teams), you would need to invite external users from Outlook. If you try to add an external user from the SharePoint site, you will get an error message.

Thus, you have to navigate to Outlook to invite external users from there. To do:

1. Navigate to Outlook

2.Under Groups on the left-hand side, click on the Group you want to add external users to, then click on the number of the Members on the right-hand-side.

3.Click Add members

4.Enter the external user’s email address and click Add

Experience for the recipient

1.The external user receives an email that looks like the one below. The user clicks on the SharePoint link to access the site and documents

2.If the user’s email account is already associated with Microsoft, he/she will be prompted to log in (enter password). Otherwise, the user would need to go and set up (create) a new account with Microsoft. Click Next.

3.On the next screen, the user chooses a password. Click Next

4.The user supplies additional information. Click Next.

5.Next, Microsoft will email a verification code to the email address. Paste the code and click Next.

6.Lastly, just hit Accept to accept terms & conditions

7.And the user is finally logged into the site

Credit https://sharepointmaven.com/