Forum Discussion
Exchange Web Services - Admin Account but without License
Hi, Is there a way to call the Exchange Web Services using an unlicensed Exchange Administrator account [unlicensedexchangeadmin@test.com] to list all public folders? Scenario: Listing Publi...
Make sure the Administrator account running the EWS script has ApplicationImpersonation permissions.
Have you checked the below threads :
https://stackoverflow.com/questions/54635471/why-does-ews-api-returns-errornonexistentmailbox-error
https://cs.mailstore.com/index.php?/Knowledgebase/Article/View/112/4/ews-error-code-errornonexistentmailbox
Since the unlicensedexchangeadmin@test.com account doesn't have a license, adding it to the ApplicationImpersonation permission still returns ErrorNonExistentMailbox.