Sometime Outlook may stop responding or experience problems because of installation issues. Luckily, Office includes a repair utility to fix common problems with the suite of apps.
To repair the installation, close any running Office application, and do the following:
- Open Settings.
- Click on Apps.
- Click on Apps & features.
- Select the Office installation. (The name of the installation will be slightly different depending on the edition you have installed.)
- Select the repair option:

- Quick repair: Resolves most issues using files already stored on your device to repair your version of Office.
- Online repair (recommended): Resolves any issues with Office, but it requires an internet connection to download the necessary files to repair your applications.
- Click the Repair button.
- Click the Modify button.

- Click the Repair button again.
Once you've completed the steps, the repair tool will do a clean reinstallation of Office, and after the process, you should be able to use the Outlook 2016 app normally without issues.