To use Word's track changes feature with RMS, provide access level under RMS as 'Full control' for a user on an individual Word document or provide 'Full Control' for the user in the SharePoint document library permissions. In order to preserve the tracked changes log in a less than full control permissions scenario, the Track Changes and Accept Changes features are disabled for users who do not have 'Full control' in the My Permission dialog for the RMS protected document. A Microsoft Word file that contains tracked changes has the changes stored in a log within the file. You will see this behavior when you don't have 'Full control' provided by Rights Management Services (RMS) for the user. This applies when the RMS is applied to individual documents or when RMS is applied to a SharePoint site library. The Track Changes control, as well as the Accept and Reject changes controls are disabled. For more info, see remove the tracked changes and comments. Word stops marking up new changesbut all of the changes that were already tracked will still be in the document. On the Review tab, turn off Track Changes.
You notice that you cannot use Word's Track Changes feature. Track Changes will still be on, but you'll be able to accept and reject changes.
You are editing a Microsoft Word document that has Rights Management Services (RMS) applied to it and includes tracked changes. For more information about this change, read this blog post. Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise.
