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Merged
merged 7 commits into from
Nov 13, 2025
+274 −9
Merged

Enable IAuthenticationOperation2 to reject MSAL cached tokens and fetch new ones from ESTS #5567

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d15b71d
Initial prototype
Nov 3, 2025
9d1b119
merge from main
Nov 5, 2025
de7adf5
Initial prototype
Nov 3, 2025
e31fc1b
Merge branch 'trwalke/AuthOpUpdate' of https://github.com/AzureAD/mic…
Nov 11, 2025
ef2a317
Refactoring
Nov 12, 2025
9fad256
Reverting csproj changes
Nov 12, 2025
69778b7
Apply suggestions from code review
bgavrilMS Nov 13, 2025
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6 changes: 6 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/Bearer/BearerAuthenticationOperation.cs
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Expand Up @@ -38,5 +38,11 @@ public IReadOnlyDictionary<string, string> GetTokenRequestParams()
// ESTS issues Bearer tokens by default, no need for any extra params
return CollectionHelpers.GetEmptyDictionary<string, string>();
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
7 changes: 7 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/IAuthenticationOperation2.cs
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Expand Up @@ -17,5 +17,12 @@ public interface IAuthenticationOperation2 : IAuthenticationOperation
/// Will be invoked instead of IAuthenticationOperation.FormatResult
/// </summary>
Task FormatResultAsync(AuthenticationResult authenticationResult, CancellationToken cancellationToken = default);

/// <summary>
/// Determines whether the cached token is still valid.
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@bgavrilMS bgavrilMS Nov 12, 2025

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Suggested change
/// Determines whether the cached token is still valid.
/// Determines whether the cached token is still valid. Only works for client_credentials flow

/// </summary>
/// <param name="cachedTokenData">Data used to determine if token is still valid</param>
/// <returns></returns>
Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData);
}
}
18 changes: 18 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/MsalCacheValidationData.cs
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@@ -0,0 +1,18 @@
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using System.Collections.Generic;

namespace Microsoft.Identity.Client.AuthScheme
{
/// <summary>
/// Data used to validate cache items for different authentication schemes.
/// </summary>
public class MsalCacheValidationData
{
/// <summary>
/// Gets the persisted parameters addded to the cache items.
/// </summary>
public IDictionary<string, string> PersistedCacheParameters { get; internal set; }
}
}
6 changes: 6 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/PoP/MtlsPopAuthenticationOperation.cs
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Expand Up @@ -48,5 +48,11 @@ public void FormatResult(AuthenticationResult authenticationResult)
{
authenticationResult.BindingCertificate = _mtlsCert;
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
6 changes: 6 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/PoP/PopAuthenticationOperation.cs
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Expand Up @@ -172,5 +172,11 @@ private string CreateJWS(string payload, string header)

return sb.ToString();
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
6 changes: 6 additions & 0 deletions src/client/Microsoft.Identity.Client/AuthScheme/PoP/PopBrokerAuthenticationOperation.cs
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Expand Up @@ -40,5 +40,11 @@ public IReadOnlyDictionary<string, string> GetTokenRequestParams()
{
return CollectionHelpers.GetEmptyDictionary<string, string>();
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
6 changes: 6 additions & 0 deletions ...nt/Microsoft.Identity.Client/AuthScheme/SSHCertificates/SSHCertAuthenticationOperation.cs
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Expand Up @@ -60,5 +60,11 @@ public IReadOnlyDictionary<string, string> GetTokenRequestParams()
{ OAuth2Parameter.RequestConfirmation , _jwk }
};
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
6 changes: 6 additions & 0 deletions src/client/Microsoft.Identity.Client/Extensibility/ExternalBoundTokenScheme.cs
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Expand Up @@ -44,5 +44,11 @@ public IReadOnlyDictionary<string, string> GetTokenRequestParams()
{
return CollectionHelpers.GetEmptyDictionary<string, string>();
}

public Task<bool> ValidateCachedTokenAsync(MsalCacheValidationData cachedTokenData)
{
// no-op
return Task.FromResult(true);
}
}
}
16 changes: 16 additions & 0 deletions src/client/Microsoft.Identity.Client/Internal/Requests/ClientCredentialRequest.cs
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Expand Up @@ -10,6 +10,7 @@
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Identity.Client.ApiConfig.Parameters;
using Microsoft.Identity.Client.AuthScheme;
using Microsoft.Identity.Client.Cache.Items;
using Microsoft.Identity.Client.Core;
using Microsoft.Identity.Client.Extensibility;
Expand Down Expand Up @@ -76,6 +77,21 @@ protected override async Task<AuthenticationResult> ExecuteAsync(CancellationTok

MsalAccessTokenCacheItem cachedAccessTokenItem = await GetCachedAccessTokenAsync().ConfigureAwait(false);

// Validate the cached token using the authentication operation
if (AuthenticationRequestParameters.AuthenticationScheme != null &&
cachedAccessTokenItem != null &&
AuthenticationRequestParameters.AuthenticationScheme is IAuthenticationOperation2 authOp2)
{
var cacheValidationData = new MsalCacheValidationData();
cacheValidationData.PersistedCacheParameters = cachedAccessTokenItem.PersistedCacheParameters;

if (!await authOp2.ValidateCachedTokenAsync(cacheValidationData).ConfigureAwait(false))
{
logger.Info("[ClientCredentialRequest] Cached token failed authentication operation validation.");
cachedAccessTokenItem = null;
}
}

// No access token or cached access token needs to be refreshed
if (cachedAccessTokenItem != null)
{
Expand Down
6 changes: 3 additions & 3 deletions src/client/Microsoft.Identity.Client/Microsoft.Identity.Client.csproj
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Expand Up @@ -92,7 +92,7 @@
<Compile Include="$(PathToMsalSources)\Platforms\Features\DesktopOS\**\*.cs" />
<Compile Include="$(PathToMsalSources)\Platforms\Features\DefaultOSBrowser\**\*.cs" />
<Compile Include="$(PathToMsalSources)\Platforms\Features\OpenTelemetry\**\*.cs" />

<PackageReference Include="System.Diagnostics.DiagnosticSource" />
<PackageReference Include="System.Formats.Asn1" />
<PackageReference Include="System.Security.Cryptography.Cng" />
Expand All @@ -104,7 +104,7 @@
<Compile Include="$(PathToMsalSources)\Platforms\Features\DefaultOSBrowser\**\*.cs" />
<Compile Include="$(PathToMsalSources)\Platforms\Features\DesktopOS\**\*.cs" />
<Compile Include="$(PathToMsalSources)\Platforms\Features\OpenTelemetry\**\*.cs" />

<!--System.Text.Json replaces internal NewtonSoft for NET -->
<Compile Remove="$(PathToMsalSources)\json\**\*.*" />

Expand Down Expand Up @@ -161,4 +161,4 @@
<AdditionalFiles Include="PublicAPI/$(TargetFramework)/PublicAPI.Unshipped.txt" />
</ItemGroup>

</Project>
</Project>
6 changes: 5 additions & 1 deletion src/client/Microsoft.Identity.Client/PublicApi/net462/PublicAPI.Unshipped.txt
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Expand Up @@ -2,11 +2,15 @@ const Microsoft.Identity.Client.MsalError.CannotSwitchBetweenImdsVersionsForPrev
const Microsoft.Identity.Client.MsalError.InvalidCertificate = "invalid_certificate" -> string
const Microsoft.Identity.Client.MsalError.MtlsNotSupportedForManagedIdentity = "mtls_not_supported_for_managed_identity" -> string
const Microsoft.Identity.Client.MsalError.MtlsPopTokenNotSupportedinImdsV1 = "mtls_pop_token_not_supported_in_imds_v1" -> string
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.ValidateCachedTokenAsync(Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData cachedTokenData) -> System.Threading.Tasks.Task<bool>
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.MsalCacheValidationData() -> void
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.PersistedCacheParameters.get -> System.Collections.Generic.IDictionary<string, string>
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory.GetHttpClient(System.Security.Cryptography.X509Certificates.X509Certificate2 x509Certificate2) -> System.Net.Http.HttpClient
Microsoft.Identity.Client.ManagedIdentityApplication.GetManagedIdentitySourceAsync() -> System.Threading.Tasks.Task<Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource>
Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource.ImdsV2 = 8 -> Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource
Microsoft.Identity.Client.ManagedIdentityApplicationBuilder.WithExtraQueryParameters(System.Collections.Generic.IDictionary<string, string> extraQueryParameters) -> Microsoft.Identity.Client.ManagedIdentityApplicationBuilder
static Microsoft.Identity.Client.ApplicationBase.ResetStateForTest() -> void
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
6 changes: 5 additions & 1 deletion src/client/Microsoft.Identity.Client/PublicApi/net472/PublicAPI.Unshipped.txt
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Expand Up @@ -2,11 +2,15 @@ const Microsoft.Identity.Client.MsalError.CannotSwitchBetweenImdsVersionsForPrev
const Microsoft.Identity.Client.MsalError.InvalidCertificate = "invalid_certificate" -> string
const Microsoft.Identity.Client.MsalError.MtlsNotSupportedForManagedIdentity = "mtls_not_supported_for_managed_identity" -> string
const Microsoft.Identity.Client.MsalError.MtlsPopTokenNotSupportedinImdsV1 = "mtls_pop_token_not_supported_in_imds_v1" -> string
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.ValidateCachedTokenAsync(Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData cachedTokenData) -> System.Threading.Tasks.Task<bool>
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.MsalCacheValidationData() -> void
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.PersistedCacheParameters.get -> System.Collections.Generic.IDictionary<string, string>
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory.GetHttpClient(System.Security.Cryptography.X509Certificates.X509Certificate2 x509Certificate2) -> System.Net.Http.HttpClient
Microsoft.Identity.Client.ManagedIdentityApplication.GetManagedIdentitySourceAsync() -> System.Threading.Tasks.Task<Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource>
Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource.ImdsV2 = 8 -> Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource
Microsoft.Identity.Client.ManagedIdentityApplicationBuilder.WithExtraQueryParameters(System.Collections.Generic.IDictionary<string, string> extraQueryParameters) -> Microsoft.Identity.Client.ManagedIdentityApplicationBuilder
static Microsoft.Identity.Client.ApplicationBase.ResetStateForTest() -> void
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
6 changes: 5 additions & 1 deletion src/client/Microsoft.Identity.Client/PublicApi/net8.0-android/PublicAPI.Unshipped.txt
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Expand Up @@ -2,11 +2,15 @@ const Microsoft.Identity.Client.MsalError.CannotSwitchBetweenImdsVersionsForPrev
const Microsoft.Identity.Client.MsalError.InvalidCertificate = "invalid_certificate" -> string
const Microsoft.Identity.Client.MsalError.MtlsNotSupportedForManagedIdentity = "mtls_not_supported_for_managed_identity" -> string
const Microsoft.Identity.Client.MsalError.MtlsPopTokenNotSupportedinImdsV1 = "mtls_pop_token_not_supported_in_imds_v1" -> string
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.ValidateCachedTokenAsync(Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData cachedTokenData) -> System.Threading.Tasks.Task<bool>
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.MsalCacheValidationData() -> void
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.PersistedCacheParameters.get -> System.Collections.Generic.IDictionary<string, string>
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory.GetHttpClient(System.Security.Cryptography.X509Certificates.X509Certificate2 x509Certificate2) -> System.Net.Http.HttpClient
Microsoft.Identity.Client.ManagedIdentityApplication.GetManagedIdentitySourceAsync() -> System.Threading.Tasks.Task<Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource>
Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource.ImdsV2 = 8 -> Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource
Microsoft.Identity.Client.ManagedIdentityApplicationBuilder.WithExtraQueryParameters(System.Collections.Generic.IDictionary<string, string> extraQueryParameters) -> Microsoft.Identity.Client.ManagedIdentityApplicationBuilder
static Microsoft.Identity.Client.ApplicationBase.ResetStateForTest() -> void
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
6 changes: 5 additions & 1 deletion src/client/Microsoft.Identity.Client/PublicApi/net8.0-ios/PublicAPI.Unshipped.txt
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Expand Up @@ -2,11 +2,15 @@ const Microsoft.Identity.Client.MsalError.CannotSwitchBetweenImdsVersionsForPrev
const Microsoft.Identity.Client.MsalError.InvalidCertificate = "invalid_certificate" -> string
const Microsoft.Identity.Client.MsalError.MtlsNotSupportedForManagedIdentity = "mtls_not_supported_for_managed_identity" -> string
const Microsoft.Identity.Client.MsalError.MtlsPopTokenNotSupportedinImdsV1 = "mtls_pop_token_not_supported_in_imds_v1" -> string
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.ValidateCachedTokenAsync(Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData cachedTokenData) -> System.Threading.Tasks.Task<bool>
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.MsalCacheValidationData() -> void
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.PersistedCacheParameters.get -> System.Collections.Generic.IDictionary<string, string>
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory.GetHttpClient(System.Security.Cryptography.X509Certificates.X509Certificate2 x509Certificate2) -> System.Net.Http.HttpClient
Microsoft.Identity.Client.ManagedIdentityApplication.GetManagedIdentitySourceAsync() -> System.Threading.Tasks.Task<Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource>
Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource.ImdsV2 = 8 -> Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource
Microsoft.Identity.Client.ManagedIdentityApplicationBuilder.WithExtraQueryParameters(System.Collections.Generic.IDictionary<string, string> extraQueryParameters) -> Microsoft.Identity.Client.ManagedIdentityApplicationBuilder
static Microsoft.Identity.Client.ApplicationBase.ResetStateForTest() -> void
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
6 changes: 5 additions & 1 deletion src/client/Microsoft.Identity.Client/PublicApi/net8.0/PublicAPI.Unshipped.txt
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Expand Up @@ -2,11 +2,15 @@ const Microsoft.Identity.Client.MsalError.CannotSwitchBetweenImdsVersionsForPrev
const Microsoft.Identity.Client.MsalError.InvalidCertificate = "invalid_certificate" -> string
const Microsoft.Identity.Client.MsalError.MtlsNotSupportedForManagedIdentity = "mtls_not_supported_for_managed_identity" -> string
const Microsoft.Identity.Client.MsalError.MtlsPopTokenNotSupportedinImdsV1 = "mtls_pop_token_not_supported_in_imds_v1" -> string
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.ValidateCachedTokenAsync(Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData cachedTokenData) -> System.Threading.Tasks.Task<bool>
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.MsalCacheValidationData() -> void
Microsoft.Identity.Client.AuthScheme.MsalCacheValidationData.PersistedCacheParameters.get -> System.Collections.Generic.IDictionary<string, string>
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory
Microsoft.Identity.Client.IMsalMtlsHttpClientFactory.GetHttpClient(System.Security.Cryptography.X509Certificates.X509Certificate2 x509Certificate2) -> System.Net.Http.HttpClient
Microsoft.Identity.Client.ManagedIdentityApplication.GetManagedIdentitySourceAsync() -> System.Threading.Tasks.Task<Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource>
Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource.ImdsV2 = 8 -> Microsoft.Identity.Client.ManagedIdentity.ManagedIdentitySource
Microsoft.Identity.Client.ManagedIdentityApplicationBuilder.WithExtraQueryParameters(System.Collections.Generic.IDictionary<string, string> extraQueryParameters) -> Microsoft.Identity.Client.ManagedIdentityApplicationBuilder
static Microsoft.Identity.Client.ApplicationBase.ResetStateForTest() -> void
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
Microsoft.Identity.Client.AuthScheme.IAuthenticationOperation2.FormatResultAsync(Microsoft.Identity.Client.AuthenticationResult authenticationResult, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task
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