Considerations when creating an Office 365 Group using app-only tokens

When you create a new Office 365 Group using the Microsoft Graph using app-only tokens, the Group will not have an owner – which is expected as you are creating the group as an application.

After the creation of the group you need to explicitly add an owner, and make sure you also add the same person as a member.

Summarized steps:

1. Create the group
2. Add a person as owner
3. Add the person in 2) as a member