Microsoft 365 Groups (formerly known as Outlook Groups as far as I can remember) are an easy way to set up a shared collaboration space with a group of colleagues. Creating a group provides you with a mailing list, shared calendar, and SharePoint space for documents.
One feature I found missing, however, was a way to share a link for folks to use to join your group!
Though it’s missing in Outlook as far as I can tell, there’s a URL that allows you to achieve this:
Just fill in your group’s name and folks who click the link will be prompted to join.