Where to sign in to Office 365 for business

Sign in at: www.office.com/signin

Note: 
For Office 365 operated by 21Vianet in China, sign in with your work or school account at https://login.partner.microsoftonline.cn.
For Office 365 Germany, sign in with your work or school account at https://portal.office.de.

Switch between accounts

If you're already signed in with one account, for example, you're signed in with a Microsoft account and you want to sign in with a work or school account instead, or vice versa, do the following:

• Sign out of the account you're signed in with, and then sign in with the new account. Or,

• Open a private browsing session in a new browser window. Search your web browser's help if you're not sure how to do this.

What if my password doesn't work or I still can't sign in?

See I can't remember the account or password I use with Office and select the tab for your Office product.

See Also

Download and install or reinstall Office 365, Office 2016, or Office 2013 on your PC or Mac