New/Update-MgUserEvent only updates Subject and ShowAs

Question

New/Update-MgUserEvent only updates Subject and ShowAs

Edwin J. Wensley 1

Here's a portion of the code to create a new calendar event:

Connect-MgGraph -TenantId $TenantId -ClientId $ClientId -CertificateThumbprint $Thumbprint
$User = Get-MgUser -UserId "******@contoso.com"
$startDateTime = @{
DateTime = "2025-04-15T14:00:00"
TimeZone = "Eastern Standard Time"
}
$endDateTime = @{
DateTime = "2025-04-15T15:00:00"
TimeZone = "Eastern Standard Time"
}
$NewEvent = @{
Start = $startDateTime
End = $endDateTime
Subject = "Sample Test Event"
}
$createEvent = New-MgUserEvent -UserId $User.Id -BodyParameter $NewEvent

This creates a new calendar event but not using the correct time; it creates a 30-minute event at the next 30-minute block (e.g., at 1:44, it will create a 2:00-2:30 event). Similarly, when I use Update-MgUserEvent, it only changes the subject regardless of any other properties I request to change. I tested updating most of the fields, and the only ones that would change were Subject and ShowAs (though I don't care about changing the value for ShowAs). Connect-MgGraph app permissions are Calendars.Read, Calendars.ReadBasic.All, Calendars.ReadWrite, and User.Read.All. No errors are reported; it just doesn't create or update anything except for the Subject (and ShowAs).

SrideviM 2,055 Reputation points Microsoft External Staff

2025-04-17T06:52:50.49+00:00
Hello Edwin J. Wensley,

I understand you are trying to create a calendar event using New-MgUserEvent, but the event is always created at the next 30-minute time block, and the time or time zone you provide is ignored.

This is a known issue in the Microsoft Graph PowerShell SDK and has been reported by other users as well.

You can track the issue on GitHub here:

https://github.com/microsoftgraph/msgraph-sdk-powershell/issues/3271

Until the fix is released, you can use Invoke-MgGraphRequest to create the event correctly. Here's how you can do it using the same input values from your original script:

$TenantId = "tenantId" $ClientId = "appId" $Thumbprint = "thumbprint" Connect-MgGraph -TenantId $TenantId -ClientId $ClientId -CertificateThumbprint $Thumbprint $UserId = "******@xxxxxxxxxxx.onmicrosoft.com" $EventPayload = @{ subject = "Sample Test Event" start = @{ dateTime = "2025-04-17T14:00:00" timeZone = "Eastern Standard Time" } end = @{ dateTime = "2025-04-17T15:00:00" timeZone = "Eastern Standard Time" } } | ConvertTo-Json -Depth 10 Invoke-MgGraphRequest -Method POST ` -Uri "https://graph.microsoft.com/v1.0/users/$UserId/events" ` -Body $EventPayload ` -ContentType "application/json

This will create the event at the correct time using the exact values you specify.

Hope this helps!

Kindly consider upvoting the comment if the information provided is helpful. This can assist other community members in resolving similar issues.

Your answer

SrideviM 2,055 Reputation points Microsoft External Staff

2025-04-17T06:52:50.49+00:00

Hello Edwin J. Wensley,

I understand you are trying to create a calendar event using New-MgUserEvent, but the event is always created at the next 30-minute time block, and the time or time zone you provide is ignored.

This is a known issue in the Microsoft Graph PowerShell SDK and has been reported by other users as well.

You can track the issue on GitHub here:

https://github.com/microsoftgraph/msgraph-sdk-powershell/issues/3271

Until the fix is released, you can use Invoke-MgGraphRequest to create the event correctly. Here's how you can do it using the same input values from your original script:

$TenantId = "tenantId" $ClientId = "appId" $Thumbprint = "thumbprint" Connect-MgGraph -TenantId $TenantId -ClientId $ClientId -CertificateThumbprint $Thumbprint $UserId = "******@xxxxxxxxxxx.onmicrosoft.com" $EventPayload = @{ subject = "Sample Test Event" start = @{ dateTime = "2025-04-17T14:00:00" timeZone = "Eastern Standard Time" } end = @{ dateTime = "2025-04-17T15:00:00" timeZone = "Eastern Standard Time" } } | ConvertTo-Json -Depth 10 Invoke-MgGraphRequest -Method POST ` -Uri "https://graph.microsoft.com/v1.0/users/$UserId/events" ` -Body $EventPayload ` -ContentType "application/json

This will create the event at the correct time using the exact values you specify.

Hope this helps!

Kindly consider upvoting the comment if the information provided is helpful. This can assist other community members in resolving similar issues.

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New/Update-MgUserEvent only updates Subject and ShowAs

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