Troy,
This behavior was established for security purposes. When the video system activates it gets a security token that is good for 60 days - and if it is online during that time period it will keep refreshing the security token. If it is off for 60+ days the token will expire, and you will need to get a new authorization code.
I recommend you submit your feedback regarding "offlining" the devices in the Spark Portal via your Cisco Spark app.
I hope this helps.
Kelli Glass
Moderator for Cisco Customer Communities