Video: Restrict changes to files - Microsoft Support
Use read-only protection and passwords to prevent other people from opening or modifying documents. Open the document that you want to make read-only. Select File > Info. Select Protect Document > Mark as Final. Note: In Excel, select Protect Workbook. In PowerPoint, select Protect Presentation. Select OK.
Restrict changes to files in Excel - Microsoft Support
If you don't want content reviewers to accidentally change a Word document or an Excel spreadsheet, you can use formatting and editing restrictions. Note: To further restrict reviewers from making changes to your document or spreadsheet, you can make the file read-only or you can password protect it.
Help prevent changes to a final version of a file
Anyone who receives an electronic copy of a file that has been marked as final can edit that file by removing the Mark as Final status from the file. If you want to encrypt a presentation with a password or restrict who can edit it, see Protect a document with a password .
Remove hidden data and personal information by inspecting documents …
To help protect this information, make sure that any shared documents can be accessed only by trusted users. You can find and remove hidden information in your Visio presentations by following these steps.
Restrict changes to files in Excel - Microsoft Support
If you don't want content reviewers to accidentally change a Word document or an Excel spreadsheet, you can use formatting and editing restrictions. Note: To further restrict reviewers from making changes to your document or spreadsheet, you can make the file read-only or you can password protect it.
Protection and security in Excel - Microsoft Support
Excel gives you the ability to protect your work, whether it’s to prevent someone from opening a workbook without a password, granting Read-Only access to a workbook, or even just protecting a worksheet so you don’t inadvertently delete any formulas.
Protect a worksheet - Microsoft Support
Worksheet protection is a two-step process: the first step is to unlock cells that others can edit, and then you can protect the worksheet with or without a password. In your Excel file, select the worksheet tab that you want to protect. Tip: You can select multiple, non-contiguous cells by pressing Ctrl+Left-Click.
Protect a workbook - Microsoft Support
Add a password to protect your entire workbook and control whether others can open or make changes to it. Protect your file by setting passwords for Open and Modify.
Help prevent changes to a final version of a file
Anyone who receives an electronic copy of a file that has been marked as final can edit that file by removing the Mark as Final status from the file. If you want to encrypt a presentation with a password or restrict who can edit it, see Protect a document with a password .
Protect an Excel file - Microsoft Support
To learn the difference between protecting your Excel file, workbook, or a worksheet, see Protection and security in Excel. Select File > Info . Select the Protect Workbook box and choose Encrypt with Password.
Apply sensitivity labels to your files and email - Microsoft Support
You can apply sensitivity labels to your files and emails to keep them compliant with your organization's information protection policies.
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