Monitor the cloud apps in your environment with the App Discovery report.
To effectively reduce the risk introduced by apps, a good approach is to look for a reduction over time in the number of DNS requests made by apps with high and very high-risk assessments.
You can monitor this with the App Discovery report.
Many apps can be blocked by your policy when risk levels are unacceptable, or an app category is inappropriate for your organization. For more information, see Block Apps.