Hi Haitham,
I do not know why you have 2 year license. In IPS, only different thing between licensed IPS vs non-licensed IPS is the ability to update IPS with downloaded signature file.
To answer your question, if you have 2 year license but only have 1 year service, you won't be able to download the signature update file after 1 year.
I hope this helps.
Thank you.
Edward