Get-MgUserCalendarView "The specified object was not found in the store"

Question

I'm attempting to get info on some of our resource calendars. Since this doesn't function well within the EXO Powershell, I was pointed towards the MSGraph module.

So I use these commands:

 $StartDate = "2024-01-01T19:00:00-08:00"
>> $EndDate = "2024-12-31T19:00:00-08:00"
>> Get-MgUserCalendarView -UserId "xxx@xxx.xx" -All -StartDateTime $StartDate -EndDateTime $EndDate | Select-Object -Property @{Name='EventStart';Expression={ $_.Start.DateTime}},@{Name='EventEnd';Expression={ $_.End.DateTime}},Subject, BodyPreview | Export-CSV "c:\temp\xxx.csv"

And this works fine for almost every resource I have tried this on. But one set of resource mailboxes gives this as a result:

Get-MgUserCalendarView_List:
Line |
   3 |  Get-MgUserCalendarView -UserId "xxx@xxx.xx" -All -Star …
     |  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | The specified object was not found in the store.

Status: 404 (NotFound)
ErrorCode: ErrorItemNotFound
Date:

Headers:
Cache-Control                 : private
Vary                          : Accept-Encoding
Strict-Transport-Security     : max-age=31536000
request-id                    : ab43f50a-55e9-49fa-a837-aca09feba628
client-request-id             : 607a9733-2835-4c51-8885-138338823e84
x-ms-ags-diagnostic           : {"ServerInfo":{"DataCenter":"West Europe","Slice":"E","Ring":"5","ScaleUnit":"009","RoleInstance":"AM1PEPF00027CA5"}}
Date                          : Tue, 07 Jan 2025 15:22:11 GMT

This set of resource mailboxes are coincidentally all made at about the same time, but they were made in the same way as other resource mailboxes and are (just like the other resource mailboxes) made in our EXO environment with no links to anything on-prem.

Does anyone have any idea what is going wrong?

Answer 1

Hi Jamro Chris,

Thanks for reaching out to Microsoft!

A NotFound error may occur if you lack the necessary permissions to access an object in the Exchange store.

For application permissions, grant Calendars.Read to access resource mailboxes or shared mailboxes.

For delegated permissions, ensure you grant Calendars.Read.Shared to access resource or shared mailboxes.

Ensure that the credentials used have full mailbox access rights to the target mailbox.

Similar posts: https://learn.microsoft.com/en-us/answers/questions/1080880/get-mgusercalendarview-for-room-accounts?page=1

Hope this helps.

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