Sign in with the account you use for SkyDrive, Xbox LIVE, Outlook.com, or other Microsoft services.
Sign in with the account provided by your work or school to use with Office 365 or other Microsoft services.
The Trust Center is where you can find security and privacy settings for the 2007 Microsoft Office system programs. The Very High, High, Medium, and Low security levels that were used in earlier versions of Office are now replaced with a more streamlined security system.
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