<PackageReference Include="Microsoft.Identity.Client" Version="4.82.1-preview2" />

Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource

public enum ManagedIdentitySource
Managed identity sources supported. The library will handle these internally.
AppService = 2

The source to acquire token for managed identity is App Service.

AzureArc = 3

The source to acquire token for managed identity is Azure Arc.

CloudShell = 4

The source to acquire token for managed identity is Cloud Shell.

DefaultToImds = 6

Indicates that the source is defaulted to IMDS since no environment variables are set. This is used to detect the managed identity source.

Imds = 1

The source to acquire token for managed identity is IMDS.

ImdsV2 = 8

The source to acquire token for managed identity is IMDSV2.

MachineLearning = 7

The source to acquire token for managed identity is Machine Learning Service.

None = 0

Default.

ServiceFabric = 5

The source to acquire token for managed identity is Service Fabric.