According to this article https://techcommunity.microsoft.com/t5/exchange-team-blog/troubleshooting-auth-issues-in-outlook-if-you-are-azure-joining/ba-p/1789359, you need to exclude the _HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity_ hive from roaming with your user. How are you guys handling this with FSLogix? Are you using the FSLogix registry redirection feature to redirect this to HKLM?