Recent DiscussionsMost RecentNewest TopicsMost LikesSolutionsTagged:TagRe: KB5016623 Issues with AAD App Proxy Hi! We had exactly the same issue , but with 2016 servers and KB5016622. https://support.microsoft.com/en-us/topic/august-9-2022-kb5016622-os-build-14393-5291-19fa46af-be4b-4717-b711-8499777e13a8 Unistall this KB fixed the issue.