SharePoint is accessed through Office 365. You can access Office 365 at the Office 365 home page. If this shortcut doesn't take you to the Office 365 home page, but instead takes you to email, the follow the steps in the Office 365 Home/Start Page article. 

1. Go to Log in with your email username and your Lesley password, and press the Sign in button.

2. Click on the SharePoint tile to open SharePoint.

3. The SharePoint site will come up, showing your frequent sites. The page also shows suggested sites, as well as the sites you are following. If your site is showing, just click on the name or the tile. If you don't see the site you are trying to access, then search for it in the Search bar in the upper left-hand corner.