There is no specific way/request to know status of subscription. What client can do is check if there is a status event in last double time of status frequency, means if there is no status event during the time (double of status frequency) then subscription
is surely dead/expired and need to be re-subscribed.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.