We are trying to use Coauthoring with encrypted sensitivity labels, for both pre-defined and user defined labels. This works perfectly in our test environment. However, in our production environment, we cannot get this to work. Autosave turns off immediately with an error "you can't edit encrypted files at the same times as others".
We have a ticket open with Microsoft and it is going nowhere. We have tried matching our settings to our test environment and still cannot get this to function. SharePoint legacy IRM is off, set-policyconfig -enablelabelcoauth is set to true, and all other requirements are met on the machines we are trying on (unless we have one legacy AIP client somewhere in our domain that is causing this all to fail?)
Anyone have any ideas or struggle with this same thing?