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  1. Protect a Word document with a password - Microsoft Support

    You can control access to a document by implementing a password for it. Passwords are case-sensitive and can be a maximum of 15 characters long. Create a strong password, ideally one …

  2. Change or remove workbook passwords - Microsoft Support

    To add a new password, click Protect Sheet or Protect Workbook, type and confirm the new password, and then click OK. To remove a password from the workbook, click Protect …

  3. Protect your notes with a password - Microsoft Support

    You can help keep your private notes safe from prying eyes by protecting a OneNote notebook section with a password. When a section is password-protected, all of its pages are locked …

  4. Protect an Excel file - Microsoft Support

    How to protect an Excel file using a password to prevent unwanted access to your data.

  5. 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.

  6. Require a password to open or modify a workbook

    Open the sheet or workbook that you want to protect. On the Review tab, click Protect Sheet or Protect Workbook. In the Password box, type a password, and in the Verify box, type the …

  7. Prevent changes to a Visio file - Microsoft Support

    To prevent changes to a Visio file, use document protection settings, or save the diagram in PDF or XPS format.

  8. Create and use strong passwords - Microsoft Support

    The best password managers will automatically update stored passwords, keep them encrypted, and require multi-factor authentication for access. Microsoft Edge can remember your …

  9. Password protection for presentations in PowerPoint

    You can add a password so that only authorized users can modify a presentation. Unauthorized users can still open the presentation and then save it by using a different file name.

  10. Video: Restrict changes to files - Microsoft Support

    Open the password-protected document. Select File > Info. Select Protect Document > Encrypt with Password. Note: In Excel, select Protect Workbook. In PowerPoint, select Protect …