BES PowerCLI contols?

We currently use master images for our VMware horizon pools. The master images stay turned off until we need to do updates. We typically manually start them, run updates and then shut them back down.

Does anyone know if BES has the ability with the scripting to connect to a cluster, start specific vms to be able to run the updates and then shut them back down afterwards?

Thanks

Have to explore Server Automation Part, Also you can shutdown and bring specific VM back via BigFix , For that you need to configure VM Manager Extender configuration and Once Configuration is completed and Proxied agent are visible in BigFix Consiole, You can use below Fixlet
image

Ahh, we have not set up the extender. Does pushing the extender cause any known disruption on the vcenter? Also, these are appliances if that makes a difference.

Nope, Extender configuration has to be done on Relay Server, Also Id which you would be using to configure Vcenter in BigFix should have proper right to shutdown and power On VM.
For Id rights, Please work with Vcenter team and they would provide you customized right.