You are developing an app and see one of the following CORS related errors in the console logs… Notice it starts with “https://login.microsoftonline.com“, you might have a Azure B2C scenario, so in that case it might start with “https://youdomain.b2clogin.com/…“ It is outside of scope for this article If the error is not generated by Azure AD/Entra ID, and the error looks something like this… Access to XMLHttpRequest at ‘https://app.contoso.com/…‘ We…
Read MoreUsing MSAL for Python to perform interactive sign in from a local script
This blog shows how to use MSAL for Python to perform an interactive sign in to Azure AD from running a local python script. The sample also demonstrates how to enable MSAL logging along with how to capture Python SSL web traffic using Fiddler Classic App Registration: You will need to have an Azure AD App Registration with “http://localhost” reply URL configured in the ‘Mobile and desktop applications’ platform The…
Read MoreHow to enable MSAL for Java (MSAL4J) logging in a Spring Boot application
In this blog, I’ll show how to enable MSAL4J logging using the logback framework in a spring boot web application. I’ll use our Azure AD B2C web sample here. The complete code for this blog is on github. Refer to the MSAL for Java logging documentation for more info. There are 3 main things you need to do for logging to work 1) Include the logback package in the pom.xml…
Read MoreUsing Microsoft.Identity.Web to request multiple different Azure AD Access Tokens
There are times a web application may need to log in a user and call different backend Azure AD protected web APIs. The web application would need to obtain different Access Tokens, one for each web API. In this post I will attempt to demonstrate how this can be done using MIcrosoft.Identity.Web nuget package. This sample shows how to get tokens for Microsoft Graph resource and a custom web API…
Read MoreTroubleshooting Signature validation errors
These signature validation errors are caused when the resource provider (not Azure AD) is unable to validate the signature of the token, either because the signing key could not be found or the signing key used was not able to validate the signature. This article will describe the most common scenarios and solutions. The concept and root cause is still the same and will continue to apply. Unfortunately, many developers…
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