microsoftgraph / microsoftgraph/msgraph-sdk-powershell
Set-MgDriveItemContent uses incorrectly formatted graph end ppoint
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Description
Describe the bug
I am using Set-MgDriveItemContent to upload a small test text document. It fails with the error:
Entity only allows writes with a JSON Content-Type header.
When running the command with the -Debug flag, I can see the absolute url that is using:
DEBUG: Content type text/plain
DEBUG: ============================ HTTP REQUEST ============================
HTTP Method:
PUT
Absolute Uri:
https://graph.microsoft.com/v1.0/drives/b%21kA4oNtZbvEKpPLsSjEJ7S4dfN9wGhCpAhUgEYHvSBfKhADBMk4wiQ519UTHUsHC6/items/root%3A%2Fresults-12.txt/content
The url ends with /content but per the documentation, it should end with :/content
Expected behavior
Using Invoke-MgGraphRequest and a properly edited url, the upload works:
Name Value
size 80
webUrl https://contoso.sharepoint.com/sites/o365/LicenseProcessResults/results-12.txt
cTag "c:{8567605F-7A07-491F-8473-C8D249B50820},1"
file {[mimeType, text/plain], [hashes, System.Collections.Hashtable]}
@odata.context https://graph.microsoft.com/v1.0/$metadata#drives('b%21kA4oNtZbXXXXLsSjEJ7S4dfN9wGhCpAhUgEYHv…
parentReference {[siteId, 36280e90-5bd6-42bc-a93c-bb128c427b4b], [driveType, documentLibrary], [driveId, b!kA4…
lastModifiedBy {[application, System.Collections.Hashtable], [user, System.Collections.Hashtable]}
id 016IHMIYS7MBTYKB32D5EYI46I2JE3KCBA
isAuthoritative False
eTag "{8567605F-7A07-491F-8473-C8D249B50820},1"
createdBy {[application, System.Collections.Hashtable], [user, System.Collections.Hashtable]}
name results-12.txt
shared {[scope, users]}
fileSystemInfo {[createdDateTime, 9/15/2026 2:24:13 PM], [lastModifiedDateTime, 9/15/2026 2:24:13 PM]}
@microsoft.graph.downloadUrl https://contoso.sharepoint.com/sites/o365/_layouts/15/download.aspx?UniqueId=8567605f-7a07-491f-…
lastModifiedDateTime 9/15/2026 2:24:13 PM
createdDateTime 9/15/2026 2:24:13 PM
How to reproduce
$drive = ... #set to the value of a drive in a SharePoint or Onedrive site
$uploadParams = @{
'DriveId' = $drive.Id
'DriveItemId' = 'root:/some-file-name.txt
'InFile' = "$PSScriptRoot\sample.txt" #just create a small file with some sample text
'ContentType' = 'text/plain'
'Debug' = $true
}
Set-MgDriveItemContent @uploadParams
SDK Version
2.39.0
Latest version known to work for scenario above?
No response
Known Workarounds
Use Invoke-MgGraphRequest to manually construct the url of the graph to communicate with
Debug output
Click to expand log
```DEBUG: [CmdletBeginProcessing]: - Set-MgDriveItemContent begin processing with parameterSet 'Set'.
DEBUG: [Authentication]: - AuthType: 'Delegated', TokenCredentialType: 'InteractiveBrowser', ContextScope: 'CurrentUser', AppName: 'Microsoft Graph Command Line Tools'.
DEBUG: [Authentication]: - Scopes: [AccessReview.Read.All, AccessReview.ReadWrite.All, AccessReview.ReadWrite.Membership, Application.Read.All, Application.ReadWrite.All, AppRoleAssignment.ReadWrite.All, AuditLog.Read.All, AuditLogsQuery.Read.All, Bookings.Read.All, ChannelMessage.ReadWrite, ChannelSettings.Read.All, DelegatedPermissionGrant.Read.All, DelegatedPermissionGrant.ReadWrite.All, Device.Read.All, DeviceManagementManagedDevices.Read.All, Directory.Read.All, Directory.ReadWrite.All, email, ExternalItem.Read.All, Files.Read, Group.Read.All, Group.ReadWrite.All, GroupMember.Read.All, IdentityRiskEvent.Read.All, OnPremDirectorySynchronization.Read.All, openid, Organization.Read.All, Policy.Read.All, Policy.ReadWrite.ApplicationConfiguration, PrivilegedAccess.Read.AzureAD, PrivilegedAccess.Read.AzureADGroup, PrivilegedAssignmentSchedule.Read.AzureADGroup, PrivilegedEligibilitySchedule.Read.AzureADGroup, profile, RoleManagement.Read.Directory, RoleManagement.ReadWrite.Directory, Sites.FullControl.All, Team.ReadBasic.All, TeamMember.Read.All, TeamworkDevice.Read.All, TeamworkTag.ReadWrite, User.Read, User.Read.All, User.ReadBasic.All, User.ReadWrite.All, UserAuthenticationMethod.Read.All].
DEBUG: Content type text/plain
DEBUG: ============================ HTTP REQUEST ============================
HTTP Method:
PUT
Headers:
FeatureFlag : 00000003
Cache-Control : no-store, no-cache
User-Agent : Mozilla/5.0,(Windows NT 10.0; Microsoft Windows 10.0.26100; en-US),PowerShell/7.6.5
SdkVersion : graph-powershell/2.39.0
client-request-id : 30e376a5-b08b-4c52-93df-524861239763
Accept-Encoding : gzip,deflate
Body:
This is a test upload file created at 09/14/2026 18:04:57
105
Mark was here.
DEBUG: ============================ HTTP RESPONSE ============================
Status Code:
BadRequest
Headers:
Transfer-Encoding : chunked
Vary : Accept-Encoding
Strict-Transport-Security : max-age=31536000
request-id : fa1da99e-e33b-43f5-bdb7-ca5b83de0399
client-request-id : 30e376a5-b08b-4c52-93df-524861239763
x-ms-ags-diagnostic : {"ServerInfo":{"DataCenter":"Central US","Slice":"E","Ring":"4","ScaleUnit":"004","RoleInstance":"DS2PEPF00003844"}}
Date : Tue, 15 Sep 2026 14:29:54 GMT
Body:
{
"error": {
"code": "BadRequest",
"message": "Entity only allows writes with a JSON Content-Type header.",
"innerError": {
"date": "2026-09-15T14:29:55",
"request-id": "fa1da99e-e33b-43f5-bdb7-ca5b83de0399",
"client-request-id": "30e376a5-b08b-4c52-93df-524861239763"
}
}
}
</details>
### Configuration
Windows 11 x64
$PSVersionTable
Name Value
PSVersion 7.6.5
PSEdition Core
GitCommitId 7.6.5
OS Microsoft Windows 10.0.26100
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.4
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
### Other information
_No response_Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at the Set-MgDriveItemContent entry point and reproduce the issue with the provided uploadParams and Debug output. Trace how the DriveItemId is placed into the Graph URL, then verify the resulting endpoint preserves the documented :/content delimiters and that the text upload succeeds without the JSON Content-Type error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- powershell
- Domain
- api
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 72/100