Sign in to Office 365
You don't need to install any software to use SharePoint Online. Instead, just connect through your web browser.
Sign in to your work or school account at office.com/signin.
Select the SharePoint tile on the on the Office 365 home page, or in the app launcher.
For more information, see Where to sign in to Office 365.
Connect directly to your organization's SharePoint site
Open your web browser.
Type the SharePoint site URL into the web address bar. For example, https://contoso.sharepoint.com.
Press Enter.
Some functionality is introduced gradually to organizations that have set up the targeted release options in Office 365. This means that you may not yet see this feature or it may look different than what is described in the help articles.