We keep getting the error caa5009d happen at random on some of our machines. I have not been able to tie it down to one specific cause. 1 instance is the user changed their email password, and then the next time teams loaded the error happened. For information we have a separate active directory infrastructure, from where our Office 365/Teams is running. There are no links from the domain that the machines use to Azure AD on the Office 365 tennet. I have logs from machines that’s its happened on. It can be fixed by deleting the user profile in some instances, others deleting the teams folder from the user profile, and the re-loading it has worked. Other times that has failed and a new profile is required. If anyone can help with this error that would be great! Thanks! Richard