When users insert or copy-paste a OneDrive for Business file link into an email, they will be notified if recipients of their draft message don't have access to the shared files, and they can select the document link in their draft to see and update the permissions. This feature is already available in Outlook for Android.
This message is associated with Microsoft 365 Roadmap ID 108887
When this will happen:
General Availability (Worldwide): We will begin rolling out late June 2024 and expect to complete by late July 2024.
How this will affect your organization:
When this update rolls out, your users will see warnings in their draft emails if recipients don't have access to shared documents.
What you need to do to prepare:
Consider informing your users about this capability and updating your training and documentation as appropriate.
Additional Information: