If you have multiple vCenter Server instances configured in your environment, an attempt to add a new instance might fail because of conflicting unique IDs.
You try to add a vCenter Server instance to Horizon 7, but the unique ID of the new vCenter Server instance conflicts with an existing instance.
Two vCenter Server instances cannot use the same unique ID. By default, a vCenter Server unique ID is randomly generated, but you can edit it.
- In vSphere Client, click .
- Type a new unique ID and click OK.
For details about editing vCenter Server unique ID values, see the vSphere documentation.