Try it!
Use read-only protection and passwords to prevent other people from opening or modifying documents.
Make documents read-only
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Open the document that you want to make read-only.
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Select File > Info.
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Select Protect Document > Mark as Final.
Note: In Excel, select Protect Workbook. In PowerPoint, select Protect Presentation.
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Select OK.
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Browse to the folder where you want to save the file, enter a file name, and then select Save.
When you open the file, a Marked as Final message appears at the top of the document. If you select Edit Anyway, the document is no longer read-only.
Encrypt documents with a password
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Open the document that you want to password protect.
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Select File > Info.
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Select Protect Document > Encrypt with Password.
Note: In Excel, select Protect Workbook. In PowerPoint, select Protect Presentation.
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Enter a password and select OK.
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Re-enter the password and select OK.
Remove password protection
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Open the password-protected document.
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Select File > Info.
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Select Protect Document > Encrypt with Password.
Note: In Excel, select Protect Workbook. In PowerPoint, select Protect Presentation.
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Delete the password, and then select OK.
