Sign in to Office
Depending on the account you use to sign in to Office or Office Online, you’ll be automatically signed in to Microsoft online services like OneDrive. By saving your files to OneDrive, you can work on them from almost anywhere and share them with anyone. Your files travel with you—even across different devices.
If you use Office 365, but aren't sure which account to sign in with, see Where to sign in to Office 365.
Select what you want to do:
Sign in to Office with a Microsoft account
If you have an Office 365 Home, Personal, or University subscription, watch this short video to learn more about how to use your Microsoft account to sign in.
To sign in to Office Online, go to Office.com, click a tile for any Office application or use the app launcher , and follow the prompts.
If you don’t already have a Microsoft account, click any tile, and then click Sign up for a new account.
To sign out or switch accounts while using an Office Online app on Office.com, click Sign out. If you want to use a different account, sign back in with the account you want to use. Depending on the app you're using, the Sign out link might be in the upper right corner on the navigation bar, or under the name you're signed in with.
Learn more about using Office Online at Get started at Office.com.
Sign in to Office with the work or school account you use with Office 365
If your work or school uses Office 365, watch a video about signing in and getting started with Office 365 at Get started with Office 365 for business.Use Office Online with your work or school account
To sign in to Office Online, go to Office.com and sign in with the work or school account you use with Office 365.
On the Office 365 home page or from the app launcher , click a tile for any Office application, and follow the prompts.
Sign in to an Office desktop application
If you have the current version of Office, open any Office application and, in the top right corner, click Sign in. If you see the name you used for your Microsoft account, you're already signed in.
Tip Can't find your desktop applications? See, Find Office applications in Windows 10, Windows 8, or Windows 7.
Type the email address and password you use with Office.
Which account should I use while I'm using an Office application?
Since you may have two kinds of Microsoft accounts, like a personal Microsoft account accounts you created and accounts from your work or school that use Office 365, just sign into the account that has the Office files you want to work on.
To switch between accounts in an Office application, click your name in the top right corner and click Switch account.
Add an account to Outlook
Sign out of an Office desktop application
In the Office application, select File > Account.
Under User Information select, Sign out.