Azure DB Connection Error HRESULT E_FAIL has been returned from a call to a COM component

Question

I'm deploying an ASP.Net web site to Azure. It uses an Azure SQL database. I'm trying to set this up using a password-less connection string. I've been following the steps in a tutorial on MS Docs titled " Tutorial: Secure Azure SQL Database connection from App Service using a managed identity ". It works on my machine connecting to the database. I've checked and double checked the steps. The only thing that is different is the site I'm using.

The problem I'm getting is that when I deploy it to the server and it connects to the database I'm getting a cryptic error. Does anyone know what this error message means?

[COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.]
Microsoft.Identity.Client.Platforms.net45.d__20.MoveNext() +692 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.Internal.d__6.MoveNext() +535 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.Internal.d__4.MoveNext() +230 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.Internal.Requests.d__11.MoveNext() +685 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.Internal.Requests.d__8.MoveNext() +453 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.Internal.Requests.d__14.MoveNext() +974 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Identity.Client.ApiConfig.Executors.d__2.MoveNext() +372 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
Microsoft.Data.SqlClient.<b__0>d.MoveNext() in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\ActiveDirectoryNativeAuthenticationProvider.cs:53

[AggregateException: One or more errors occurred.]
System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) +4247326
System.Threading.Tasks.Task 1.GetResultCore(Boolean waitCompletionNotification) +12576612 System.Threading.Tasks.Task 1.get_Result() +34
Microsoft.Data.SqlClient.<>c__DisplayClass137_1.b__1() in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:2723 System.Threading.Tasks.Task`1.InnerInvoke() +58
System.Threading.Tasks.Task.Execute() +48

[AggregateException: One or more errors occurred.]
System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions) +4247326
System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken) +12586685
System.Threading.Tasks.Task.Wait() +16
Microsoft.Data.SqlClient.SqlInternalConnectionTds.GetFedAuthToken(SqlFedAuthInfo fedAuthInfo) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:2723 Microsoft.Data.SqlClient.SqlInternalConnectionTds.OnFedAuthInfo(SqlFedAuthInfo fedAuthInfo) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:2581 Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\TdsParser.cs:2548 Microsoft.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Micros oft\Data\SqlClient\TdsParser.cs:2088 Microsoft.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:1357 Microsoft.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover, Boolean isFirstTransparentAttempt, Boolean disableTnir) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:2239 Microsoft.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential crede ntial, TimeoutTimer timeout) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:1757 Microsoft.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:1628 Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, ServerCertificateValidationCallback serverCallback, ClientCertificateR etrievalCallback clientCallback, DbConnectionPool pool, String accessToken, SqlClientOriginalNetworkAddressInfo originalNetworkAddressInfo, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlInternalConnectionTds.cs:465 Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnectionFactory.cs:143 Microsoft.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) in H:\tsaagent1_work\5\ s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionFactory.cs:167 Microsoft.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:918 Microsoft.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:2024 Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\net fx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:1427 Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) in H:\tsaagent1\_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionPool.cs:1310 Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionFactory.cs:357 Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) in H:\tsaagent1\_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionInternal.cs:773 Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) in H:\tsaagent1\_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionInternal.cs:773 Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\ProviderBase\DbConnectionClosed.cs:72 Microsoft.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 retry) in H:\tsaagent1\_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:1860 Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1 retry) in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:1853 Microsoft.Data.SqlClient.SqlConnection.Open() in H:\tsaagent1_work\5\s\src\Microsoft.Data.SqlClient\netfx\src\Microsoft\Data\SqlClient\SqlConnection.cs:1421

Here is the relevant snippet from the web.config file. I've changed the name of the server and database in the connection string so they remain secret.

<configSections>
  <section name="exceptionFilters" type="MGBrownWeb.Configuration.ErrorFilterSection" allowDefinition="Everywhere" allowExeDefinition="MachineToApplication" restartOnExternalChanges="true" />
  <section name="SqlAuthenticationProviders" type="Microsoft.Data.SqlClient.SqlAuthenticationProviderConfigurationSection, System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
</configSections>
<SqlAuthenticationProviders>
  <providers>
    <add name="Active Directory Interactive" type="Microsoft.Azure.Services.AppAuthentication.SqlAppAuthenticationProvider, Microsoft.Azure.Services.AppAuthentication" />
  </providers>
</SqlAuthenticationProviders>
<connectionStrings>
  <add name="MyDB" connectionString="server=tcp:my-server-tst-sqls.database.windows.net;database=database-tst-sqldb-1;UID=AnyString;Authentication=Active Directory Interactive" />
</connectionStrings>

Answer 1

It turned out that I had referenced Microsoft.Data.SqlClient from one of my projects instead of System.Data.SqlClient. Changing back to System.Data.SqlClient resolved the error.