Update-MgApplication cmdlet does not persist api.acceptMappedClaims property

[codapus-co]

Describe the bug

When updating an application registration using the Microsoft Graph PowerShell SDK (Update-MgApplication), the api.acceptMappedClaims property cannot be set. The call executes successfully (returns 200 OK), but the property remains null in the application object.

This appears to be a serialization gap in the PowerShell SDK model (MicrosoftGraphApiApplication) where the property is not included in the request payload.

# App is single-tenant, with Application.ReadWrite.All granted
$app = Get-MgApplication -Filter "displayName eq 'TestApp'"

# Attempt 1
Update-MgApplication -ApplicationId $app.Id -BodyParameter @{
    api = @{
        acceptMappedClaims = $true
    }
}

# Attempt 2 (alternate spelling found in SDK)
Update-MgApplication -ApplicationId $app.Id -BodyParameter @{
    api = @{
        acceptMappedClaim = $true
    }
}

Both calls succeed without error.
Verification with:

(Get-MgApplication -ApplicationId $app.Id).Api.AcceptMappedClaims

Works with direct Graph call:

Invoke-MgGraphRequest -Method PATCH `
  -Uri "https://graph.microsoft.com/v1.0/applications/$($app.Id)" `
  -Body '{"api":{"acceptMappedClaims":true}}'

Expected behavior

Update-MgApplication should serialize and send the api.acceptMappedClaims property in the PATCH request, allowing the field to be updated the same way it works via REST API.

How to reproduce

1. Attempt to update the acceptMappedClaims property using Update-MgApplication
2. Verify the property
3. It has the old value

SDK Version

2.26.1

Latest version known to work for scenario above?

No response

Known Workarounds

Direct Graph call

Invoke-MgGraphRequest -Method PATCH `
  -Uri "https://graph.microsoft.com/v1.0/applications/$($app.Id)" `
  -Body '{"api":{"acceptMappedClaims":true}}'

Debug output

Click to expand log

```

DEBUG: [CmdletBeginProcessing]: - Update-MgApplication begin processing with parameterSet 'Update'.
DEBUG: [Authentication]: - AuthType: 'Delegated', TokenCredentialType: 'InteractiveBrowser', ContextScope: 'CurrentUser', AppName: 'Microsoft Graph Command Line Tools'.
DEBUG: [Authentication]: - Scopes: [Application.ReadWrite.All, AppRoleAssignment.ReadWrite.All, DelegatedPermissionGrant.Read.All, DelegatedPermissionGrant.ReadWrite.All, Directory.AccessAsUser.All, Directory.Read.All, Directory.ReadWrite.All, Group.Read.All, Group.ReadWrite.All, openid, profile, RoleManagement.ReadWrite.Directory, Subscription.Read.All, User.Read, User.Read.All, email].

Confirm
Are you sure you want to perform this action?
Performing the operation "Update-MgApplication_Update" on target "Call remote 'PATCH /applications/{application-id}' operation".
[Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"): A
DEBUG: ============================ HTTP REQUEST ============================

HTTP Method:
PATCH

Absolute Uri:
https://graph.microsoft.com/v1.0/applications/{app-id}

Headers:
FeatureFlag : 00000003
Cache-Control : no-store, no-cache
User-Agent : Mozilla/5.0,(Windows NT 10.0; Microsoft Windows 10.0.26100; en-IE),PowerShell/7.5.2
SdkVersion : graph-powershell/2.26.1
client-request-id : {client-request-id}
Accept-Encoding : gzip,deflate,br

Body:
{
"description": "Order API",
"displayName": "order-api",
"identifierUris": [
"{our-uri}"
],
"signInAudience": "AzureADMyOrg",
"tags": [
"main-application",
"auto-generated"
]
}

DEBUG: ============================ HTTP RESPONSE ============================

Status Code:
NoContent

Headers:
Cache-Control : no-cache
Strict-Transport-Security : max-age=31536000
request-id : {request-id}
client-request-id : {client-request-id}
x-ms-ags-diagnostic : {"ServerInfo":{"DataCenter":"North Europe","Slice":"E","Ring":"4","ScaleUnit":"006","RoleInstance":"DU6PEPF00025209"}}
x-ms-resource-unit : 1
Date : Mon, 22 Sep 2025 11:07:33 GMT

Body:

Configuration

Name Value

---

PSVersion 7.5.2
PSEdition Core
GitCommitId 7.5.2
OS Microsoft Windows 10.0.26100
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0

Other information

No response

[gavinbarron]

Please retry this with v2.31.0 as there are known issues related to serialization in the version you note here.

[microsoft-github-policy-service]

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.