When you try to create a meeting in Planner, you get this error message:

You do not posses the required information to complete the meeting. To resolve this issue, please contact the system administrator.
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(It might have different formatting in other browsers.)
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The problem is that you are not connected to either a meeting type or billing account. Meeting type and billing account are granted through your Planner department.
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Please ask your administrator to check that your Planner user has a Planner department which contains a meeting type and billing account.