Unable to add individual or multiple hosts to a cluster using the vSphere Client after upgrading to vCenter Server 6.7 Update 1 or late

 Symptoms

• After Upgrading or Installing vCenter Server 6.7 Update 1 or later, you are unable to add individual or multiple ESXi hosts to your vSphere Clusters
• You have configured your vSphere Roles and Permissions to only allow for single host add in your vCenter Server
• This issue only appears only using the HTML 5 client

Cause

In vSphere 6.7 Update 1 and later, as part of the HCI Cluster Create and Cluster Expand, also referred to as QuickStart, the Add Host workflow was changed into a multiple Add Host workflow to allow for batches of ESXi hosts to be added to a cluster. Further, the behavior was augmented to add the host to inventory first and then to move it to the cluster in order to ensure the host is in the correct maintenance mode state. This ensures that the ESXi hosts that are being used to create or expand clusters are quiesced and prevented from running workloads until they have been properly configured.

Resolution

To use the vSphere UI, you must change the required permissions on your vSphere users in order to utilize the batch add operation for adding a single host or multiple hosts. Ensure that your users are using the following permissions in Required Privileges for Common Tasks.