A while back I was setting up a Veeam dashboard utilising the new Veeam API, but ran into an authentication token issue , which turned out to be a bug in the Veeam API. Veeam have since released an update, VBR version 11.0.1.1261 , to the API (How to handle the refresh token - Veeam R&D Forums) , but I’m still coming across the same issue. The issue is when the initial access token expires, it appears the refresh process is unable to renew the token. Have you had a chance to test this within your labs yet?