Group of Calendar

Occasional Contributor


Users are able to create Group Calendars (i.e grouping some calendars) under a name meaningful for them.


Do you know how to get them through powershell or GraphAPI. I tried but I have an error (not a 403)

error": {
        "code": "ErrorNotSupported",
        "message": "Specified method is not supported.",
and I am trying also via Powershell with Get-MgUserCalendarGroup -UserId xxx but geeting the following error
Get-MgUserCalendarGroup -UserIdXXX
Get-MgUserCalendarGroup : Could not load file or assembly 'Microsoft.Graph.Authentication, Version=,
Any Ideas are welcome
Best Regards
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