One of the things that probably annoys Microsoft is how slow companies and people upgrade their products. Certain companies are even slower due to customer requirements.
From time to time; the question of how long will Microsoft support a product will be raised.
Luckily; Microsoft has provided a page to answer this question.
Simply, enter the product name and it will list out dates. Of course, expiration dates can be expended but you shouldn’t gamble on it.