Formula Character Limits


I have an index/match formula searching 36 different sheets for a single input. As you an imagine, this is a very long formula and I think I may have reached the limit for a single cell formula as I cannot continue to add to it. Is there a way around this?

What i'm doing is creating a master sheet in which one formula will look for an employee's email address that may or may not be present in 1 or several of the 36 sheets and return some specified data related to that email address. Is there an easier way to do this than index/match cross-sheet references that will allow me to search all 36 sheets without reaching the formula limit?