You can get quick access to the apps you use every day by adding or removing apps in the app launcher.
Important: To be able to customize your app launcher (like by adding or removing apps), your organization must have Exchange Online as part of your Office 365 for business subscription. (Exchange Online is used for your work or school email that you receive using Outlook or Outlook Web App.)
To add an app to the app launcher
Choose the app launcher at the top of the screen, and then choose My apps.
Locate the app you want and choose More options > Pin to app launcher.
To remove an app from the app launcher
Open the app launcher , and choose the app you want to remove.
Click More options > Unpin from app launcher.