Add Security to Your Important Documents in Office 2010

RESTRICT EDITING ACCESS

If you’re document needs to be in a certain format and you don’t want people making incorrect edits, you can control the types of changes people can make.
Click on the File
Click on Info
Protect Document
Select Restrict Editing.

The Restrict Formatting and Editing menu will display on the right side of the document. Here you can limit formatting and selection types.

Click on the Settings link to really drill down exactly what can and can’t be edited in the document.

Now you can select the users on your domain who can edit the document.

After you’ve selected your editing restrictions click on Yes, Start Enforcing Protection.

Now enter in an optional password for the editing enforcements.

If a user tries to stop the editing protection, they’ll be prompted for the password you created when you started enforcing protection.