You can view a list of all users whom you or other owners have blocked from your organization.

  1. In the top right corner of GitHub, click your profile photo, then click Your profile. Profile photo

  2. On the left side of your profile page, under "Organizations", click the icon for your organization. organization icons

  3. Under your organization name, click Settings. Organization settings button

  4. In the settings sidebar, click Blocked users. Blocked users tab in the organization settings sidebar

  5. Under "Blocked users", review the list of users who are blocked from your organization. List of blocked users

Further reading