• Making a lot of ESXi host changes to a cluster within a short time so as to avoid constant vSphere HA error messages during those changes.
• During troubleshooting of vSphere HA agent problems on some ESXi hosts.
• While downgrading a license. VMware HA might not be supported by the downgraded license.

VMware vCenter Server 4.1.x
VMware vCenter Server Appliance 6.0.x
VMware ESXi 4.1.x Installable
VMware vCenter Server 7.0.x
VMware ESX 4.0.x
VMware vSphere ESXi 5.0
VMware vCenter Server 6.7.x
VMware vCenter Server 5.1.x
VMware vCenter Server 5.5.x
VMware vSphere ESXi 5.1
VMware ESXi 4.0.x Installable
VMware vCenter Server Appliance 6.7.x
VMware vCenter Server 6.5.x
VMware ESXi 4.1.x Embedded
VMware ESX 4.1.x
VMware ESXi 4.0.x Embedded
VMware vCenter Server 6.0.x
VMware vCenter Server 4.0.x
VMware vCenter Server 5.0.x
VMware vCenter Server Appliance 6.5.x

Note:

• You may need to complete this process for multiple clusters. VMware HA can be disabled only if there are no virtual machines with VMware Fault Tolerance (FT) enabled. If there are virtual machines with VMware FT enabled in the cluster you are disabling, turn off VMware FT before disabling VMware HA. The process of turning off VMware FT is described in Disabling or turning Off VMware FT.
• Virtual Machine Monitoring will also be disabled when HA is disabled.
• The process may take some time to complete.

1. Log in to the vSphere Client.
2. From the Home screen, click on Hosts and Clusters.
3. Browse to the cluster.
4. Click the Configure tab.
5. Select vSphere Availability and click Edit.
6. Deselect the VMware HA option.
7. Click OK.

To disable vSphere HA in the vSphere Web Client:

1. Log in to the vSphere Web Client
2. From the Home screen, click on Hosts and Clusters.
3. Browse to the cluster.
4. Click the Configure tab
5. Select vSphere Availability and click Edit.
6. Deselect the Turn On VMware HA option.
7. Click OK.

For more information on vSphere Availability, see About vSphere Availability

For translated versions of this article, see:

• Português: Desabilitar VMware High Availability (HA)
• 日本語: VMware High Availability (HA) の無効化
• 简体中文: 禁用 VMware High Availability (HA)

Re-configuring vSphere HA: Configure vCenter HA With the vSphere Client

Troubleshooting vSphere HA: Error: "vSphere HA agent cannot be correctly installed or configured"