Connectivity Test Failed Exchange server

Question

Answer 1

Hello @Ibrahim Shawky !

Thanks for the update it is clear now

Basic Authenication got deprecated since October 2022

As of this date, Basic Authentication is no longer accepted; you have to use OAuth 2.0 (modern authentication) for your connections. This is likely the cause of the 401 Unauthorized error message.

I think i know where to point you

The thread below is a similar issue

https://learn.microsoft.com/en-us/answers/questions/751378/microsoft-exchange-webservices-data-(401)-unauthor

To start with something ----------->

You have to :

Register your Application in Azure Active Directory: Go to Azure Portal -> Azure Active Directory -> App registrations -> New registration. Note down the Application (client) ID, you will need it in your code.

1. Register your application with Azure Active Directory.
   

2. Add code to get an authentication token to get an authentication token from a token server.
   

3. Add an authentication token to EWS requests that you send.
   

Have a look also here :

https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-authenticate-an-ews-application-by-using-oauth

I hope this helps!

Kindly mark the answer as Accepted and Upvote in case it helped!

Regards

Answer 2

Hello @Ibrahim Shawky !

Welcome to Microsoft QnA!

Please try to include as more info as you can into your Questions

The more info we get the more help could be available

Now , the message is most likely caused by wrong credentials , username / password

Try to use he UPN of the user

Have a look here also :

https://community.spiceworks.com/topic/2284165-exchange-2016-autodiscover-401-unauthorized

I hope this helps!

Kindly mark the answer as Accepted and Upvote in case it helped!

Regards