I am unable to add a guest to a Office 365 group

Last 2 weeks I got a question more than one time.

The question was:

Why is it not possible to add a guest to a Group?

This when even the settings in the administrator panel are correct to share. With people outside my own organization

I had to search as well. First I checked the settings in the Admin Console if they were correct. The settings were correct. Still, it was not possible to share with external people. The group was Private and not public. Which did not matter in the end.

After a while, i went to the group as a group owner.

Within the group, I clicked on Members.

On the panel, I clicked to add members in the textbox.

In the text box, I added the external email address but I was unable to Save the email. after a while, I saw the Hyperlink which was hidden in the text above the text box where you put in the address.

When you click on the Hyperlink you get directly in Outlook.

Here you can add someone direct. With an external Email address. Just be sure your organization lets you Share with externals.

It is possible that your organization global settings are not correct.

In this case, you can change it by going to the admin console.

Here you click on groups and sharing.

if you have done that. It is still possible that your SharePoint settings are not correct for sharing. Be sure you may share with externals.