We've successfully implemented M365 Apps and applied App protection policies (WIP with enrollment). All components are functioning as anticipated, with the exception of M365 Outlook. Our users are encountering an issue when they attempt to attach files from OneDrive or paste text from a work document. They receive a warning message that reads, "Can't use work content here. Your organization doesn't allow you to use work content here."
Interestingly, this problem arose following our migration from Outlook 2016 to M365 Outlook. A peculiar observation is that pasting text from the work context into the "To", "Cc", or "Subject" fields works without any issue, but doing the same into the body of the e-mail is not permitted.
Any assistance or guidance on this matter would be appreciated.