Identifying and filtering tenants using multi-tenant Azure AD SSO (Open ID Connect)

We have a SaaS web application hosted with a non-Azure provider. Currently users access it via built-in individual user accounts, but we are implementing multi-tenant SSO via Azure AD (Open ID Connect). The aim here is for each organisation (using Azure AD) to subscribe to our web application to allow their users to sign in.

Will MSAL be able to maintain a token cache and refreshes tokens for you when they are close to expire in case of Custom REST API secured by Azure AD

Based on the documentation details for MSAL (Azure AD) mentioned at : https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/wiki/MSAL.NET-supports-multiple-application-architectures-and-multiple-platforms#msalnet-is-about-acquiring-tokens-not-protecting-an-api

Getting an unconfigured reply URL error on Blazor App with Azure AD authentication

I’ve created a template Blazor Server Side project in VS with single tenant Azure AD authentication. Running the app on localhost i’m able to log in fine, but unable to log in when the app is published as Azure Web app. Error: AADSTS50011: The reply URL specified in the request does not match the reply URLs configured for the application: ‘app client id here’.

404 error while creating Online Meeting using microsoft graph api c# without login into AzureActiveDirectory

I am trying to create Online Meeting using microsoft graph api without login into AzureActiveDirectory with asp.net web application.For this my app has below permissions which are required as per documentation https://docs.microsoft.com/en-us/graph/api/application-post-onlinemeetings?view=graph-rest-1.0&tabs=csharp with client credential auth flow https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow without immediate interaction with a user.I am able to retrive access token successfully as per client-creds-grant-flow.
I tried Micosoft.Graph and Micosoft.Graph.Beta still getting 404 error.