Go to File > Info > Protect Document > Encrypt with Password. Type a password, press OK, type it again and press OK to confirm it. Save the file to make sure the password takes effect.

Removing a password from a document is a simple process, but you have to know the original password. Open the document and enter its password. Go to File > Info > Protect Document > …

Use Restrict Editing to protect parts that can or can't be changed, who can make changes, find areas you can edit, or unlock a protected document.

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

When you open a Microsoft Word document that is protected with a "modify" password, you may not be prompted for the password if the document exists in a Microsoft Exchange or Microsoft …

Save the document. Select the File tab. Select Info, choose Protect Document, point to Restrict Permission by People, and then select Restricted Access. In the Permissions dialog box, …

You cannot open a workbook or document that has been password protected in the Windows-based version of Excel or Word if the password is longer than fifteen characters. If you want to …

If your organization uses Microsoft Purview Information Protection, they probably want you to apply that same protection to any PDFs you create from Microsoft Office files. Here's how to do it.

Click Review > Restrict Editing. Under Editing restrictions, check Allow only this type of editing in the document, and make sure the list says No changes (Read only). Click Yes, Start Enforcing …

In Microsoft Word, a password-protected document cannot be recovered if the password for that document is lost or forgotten. Microsoft does not offer a service to retrieve documents to which …