Exchange EWS HTTP error 403

Question

Exchange web service on one exchange server is open opening, giving following error on clients, network accesses and IIS permissions are accurate, also run the below article suggestion but didn't work, need an expert opinion.

https://social.technet.microsoft.com/Forums/office/en-US/9beed320-8e5b-4768-b362-7ecffb736bd9/ews-failing-with-the-request-failed-the-remote-server-returned-an-error-403-forbidden?forum=exchangesvrdeploylegacy![225942-ews.jpg][1]

Answer 1

Check MRS PRoxy; try to disable and enable it, don’t forget to restart Internet Information Services (IIS) using the iisreset command.
https://support.microsoft.com/en-us/help/3063913/the-remote-server-returned-an-error-403-forbidden-error-when-you-try-t
and please enable Basic Authentication on Web Services Virtual Directory:

Set-WebServicesVirtualDirectory –identity SERVERNAME\EWS (Default Web Site) -BasicAuthentication $TRUE  

Answer 2

Hi @Muhammad Hussain ,
1.The error message is that the user does not have access, you can try to create a new account and grant administrator permissions.

2.Are you using Google Chrome? Do you open other things with the same error? Depending on my search, this may be related to the browser, you can try the following methods:
(1)Clear your browser's cookies and cache
(2)Use another browser
(3)Open the page in Incognito Mode
There are two articles you can refer to:
https://solutionbay.com/solutions/how-to-fix-you-dont-have-authorization-to-view-this-page-http-error-403
https://appuals.com/fix-you-dont-have-authorization-to-view-this-page/
Microsoft provides third-party contact information to help you find additional information about this topic. This contact information may change without notice. Microsoft does not guarantee the accuracy of third-party contact information.

3.If your login page uses http, which can also cause problems, you need to redirect it to https, there is a similar example to refer to:
https://community.spiceworks.com/topic/2219486-exchange-2013-403-forbidden

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