Microsoft on-premises server product that runs Office Online.
Thank you for reaching out to Microsoft Q&A Forum. I completely understand how stressful this situation is, especially when you are dealing with permissions issues and important content seems to have vanished.
To clarify, when you open a document in a browser (Word for the Web), there is no manual "Save" button. The system Auto-Saves every few seconds. As soon as you pasted the new text, Word saved it as the current version. However, Microsoft 365 automatically keeps a history of every previous version.
You may consider trying my suggestions to restore the original document:
Method 1: From inside the document
- If you still have the file open, click the File tab at the top left and select Version History.
- A pane will open on the right side of the screen listing dates and times > Click on a version timestamp that is before the accident occurred.
- Word will reload the page to show you exactly what the document looked like at that time.
- Look at the top of the document window, you will see buttons for Save a Copy and Restore: click Restore to bring back your original content, or click Save a Copy if you prefer to create a separate backup file.
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Method 2: From the Folder view
- If you have already closed the document, go to the website where the file is stored (OneDrive, SharePoint, or the Files tab in Teams).
- Single-click the file to select it (do not open it) > Click the three dots (...) or right-click the file name.
- Select Version History.
- Find the version date from before the mistake happened > Click the three dots (...) next to that specific date and choose Restore.
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For a visual guide on how this works, you can view the official article here: Restore a previous version of a file stored in OneDrive - Microsoft Support
In the very unlikely event that the "Restore" button is grayed out or you receive a permission error, kindly copy the web link of the file and ask your IT support help restore the previous version.
I hope this explanation clarifies the situation and one of these steps gets you back up and running. Please let me know how you get on, as your feedback is valuable to the community.
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