Note the following while modifying SharePoint service groups:
The wizard has a single workflow that performs service group creation as well as modification tasks. If you wish to add or remove a SharePoint component from the configuration, you must run the wizard again.
If you run the wizard after configuring the SharePoint service groups, the wizard modifies the existing service group configuration. The wizard rediscovers the SharePoint configuration in the farm and then adds or removes resources depending on the changes made.
For example, if you add a node to the server farm, the wizard adds the required resources and service groups to the configuration. If an application is removed from the server farm, the wizard removes the corresponding resources from the service group and also updates the VCS configuration.
You can add or remove nodes from the service group SystemList. If you want to remove a node, ensure that you do not run the wizard to modify the service group from that node.
The wizard automatically configures all the discovered SharePoint applications and services configured in the local cluster farm. You cannot choose applications or services for the service group configuration.
If you do not want an application or a service to be part of the configuration, host it on a server outside the local cluster.
When you run the wizard after configuring the SharePoint service groups, the wizard ignores any custom resources that you may have added to the service groups. If you wish to add, remove, or modify those custom resources, you must do so manually. The wizard does not provide any options to modify custom resources.
If you add a system to an online service group, any resources with local attributes may briefly have a status of unknown. After you add the new node to the group, run the VCS SharePoint Server Configuration Wizard on this node to configure the SharePoint services for it.