It will automatically renew, as long as you use it (i.e. make at least one Graph API call). As for checking the expiration date, you can do so from the admin portal, under the Billing section.
How do I renew my E5 subscription for the Developer Program?
Albert Xiao
30
Reputation points
I already see Renewable E5 subscription
in the developer center, but I can't click renew anywhere!
Can you tell me exactly how to go about renewing my subscription? Or how long before the expiration date does the subscription automatically renew?