Answers above are pretty much on point. Just make sure you have documentation to prove that the results of your testing are good to cover you just in case of an issue later on.
However, this is always the issue with QA, out of shelf life items/expired and management wants to use it... IF QA allows the use of out of shelf life/expired items, this almost always set precedent for next time this occurs and you end up just being swallowed by this system of using expired/out of shelf life products.
I shake my head when I go to a facility where their QA allows such thing and they think ALL QA will allow this. They even have the guts to say, its low risk anyway, we can still use it. If the supplier does not want to give extension to their product, there is probably a reason for it.
I understand risk assessment but, management always always takes advantage of this, so please stand your ground. I hope this is not a regular practice in your company and you might want to look into production planning and purchasing of these expired items, and refuse to do fire fighting on such.