The vCenter Server must be online in order for the deletion process to succeed.
1. Log in to the web UI on the relevant Rubrik cluster.
2. Click the gear icon on the top bar of the web UI (Settings menu).
3. From the Settings menu, select Manage vCenters.
4. Click the ellipsis icon of a vCenter Server entry.
5. Click Delete.
A confirmation dialog box will appear.
6. Click Delete.