As far as I remember, it will definitely reset the phones when you will click on Update Subscription but I do not have access to lab right now so cannot confirm for sure. But, since the service had been created with Enterprise Subscription checked on, I would definitely not take the risk of doing it in business hours in case the number of phones is too large in the setup.
Hi, im pretty sure the phones will restart however all the phones don't restart together as soon as you click update subscription like it would if you clicked restart on the device pool for example, and depending on the number of phones in the cluster it can take a while to get through them all which I think it warns you about when you click update subscriptions.
Not sure exactly what order it updates and restarts the phones however I did this recently when changing the corporate directory URL and phones located in the same building took different time intervals to restart and update.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.