FortiPhish: Why do I only see Azure AD groups when I create my campaign and not Azure AD users?

[EPPLE]

Dear Support Team,
I am writing to seek assistance with an issue I encountered on your platform.
Under https://fortiphish.com/users all Azure AD Users wer added, I can see them.
Under https://fortiphish.com/user_groups I see all Azure AD groups.
But when I create a campaign https://fortiphish.com/campaigns/create in step 3 Select a target I only see the Azure AD groups.
Why?
I look forward to your response.