Given that there is no notification of subscription renewal date for the Server Version of Manager, if we renew early does it impact the actual renewal date? ie. Bring the subscription renewal period forward to the new renewal date.
During renewal you need to supply your existing product key. Manager will chain it so 1 year will be added to the existing expiry date if renewing earlier.
It means, if your expiry is in 3 months and you renew for 1 year, expiry of new product key will be in 15 months.