Hello,

I am currently unable to sign in to DataMiner Integration Studio (DIS) using my account.

When I click on the "Sign in..." button in DIS Settings (DIS 3.1.18 + Visual Studio 2022):

A blank popup window appears and stays for about 1 minute.

After that, the authentication options are displayed.
I click on the "MICROSOFT" button.

After approximately 2 minutes, it fails with an error. I do not even get the possibility to enter my credentials. The login process never reaches the stage where I can input my username/password

Below are the logs captured from the DIS output:

2026/03/27 16:54:21.490|SkylineAPI|Signing in...
2026/03/27 16:54:21.490|AzureB2C|Always|False MSAL 4.82.1.0 MSAL.Desktop 4.8 or later Windows 10 Enterprise [2026-03-27 15:54:21Z] [Internal cache] Total number of cache partitions found while getting refresh tokens: 0. PartitionKey False
2026/03/27 16:54:21.490|AzureB2C|Always|False MSAL 4.82.1.0 MSAL.Desktop 4.8 or later Windows 10 Enterprise [2026-03-27 15:54:21Z] [Internal cache] Total number of cache partitions found while getting accounts: 0. PartitionKey False
2026/03/27 16:57:17.796|AzureB2C|Error|False MSAL 4.82.1.0 MSAL.Desktop 4.8 or later Windows 10 Enterprise [2026-03-27 15:57:17Z - 850a0d11-11d1-4a14-8e72-2bbf4239ed55] Exception type: Microsoft.Identity.Client.MsalClientException
, ErrorCode: authentication_ui_failed
To see full exception details, enable PII Logging. See https://aka.ms/msal-net-logging
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.WindowsFormsWebAuthenticationDialog.ShowBrowser(CancellationToken cancellationToken)
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.WindowsFormsWebAuthenticationDialog.OnAuthenticate(CancellationToken cancellationToken)
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.WindowsFormsWebAuthenticationDialogBase.AuthenticateAAD(Uri requestUri, Uri callbackUri, CancellationToken cancellationToken)
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.InteractiveWebUI.OnAuthenticate(CancellationToken cancellationToken)
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.WebUI.<>c__DisplayClass20_0.<AcquireAuthorizationAsync>b__0()
at Microsoft.Identity.Client.Platforms.Features.WinFormsLegacyWebUi.WebUI.<AcquireAuthorizationAsync>d__20.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.AuthCodeRequestComponent.<FetchAuthCodeAndPkceInternalAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.AuthCodeRequestComponent.<FetchAuthCodeAndPkceVerifierAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.Requests.InteractiveRequest.<GetTokenResponseAsync>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.Requests.InteractiveRequest.<ExecuteAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.Requests.RequestBase.<>c__DisplayClass11_1.<<RunAsync>b__1>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Utils.StopwatchService.<MeasureCodeBlockAsync>d__4.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Identity.Client.Internal.Requests.RequestBase.<RunAsync>d__11.MoveNext()