How is your host currently licensed? And what type of license are you attempting to apply? Please do not post the license in a response.
The host is currently running on a free license, so I am unable to perform backups.
I purchased vSphere 6 Essentials kits to upgrade all of my hosts, and most of them have accepted the upgraded keys.
But I have a couple of boxes that throw errors.
Are you able to restart the hosts which exhibit the error? I would try that first.
I'll have to schedule an interruption, but I should be able to manage that over the next few days.
I'll report back once I've given this a try.
Thank you for the suggestion!
You can try to restart the Management Agents using the DCUI. Login into the DCUI and go to the Troubleshooting section. Restart the Management Agents. This does not interrupt the operation of the VMs.Best regards
Another responder suggested trying to restart the Management Agents, and that sounded like a less intrusive course of action. However, that seemed to interfere with connectivity, so I ended up having to reboot anyway. Once the host was back online I was able to successfully apply the new license.
Thanks for all the help!