Adjustment of Status - I-485

Hi everyone...

I am just looking to hear about experiences.
I recently filed an I-131 alongside an I-131 with my husband (he is a US Citizen), as well as an I-765, an I-485 and supporting forms.

I had my biometrics on Monday 02/01/16, and yesterday received notice that my expedited case was being looked into by an IO (we needed to expedite because my husband is deploying with the Air Force in just 2 short months). Today, I got an email saying that more evidence is required.

Has anyone received something like this before? If so, what was your additional evidence need?
What happened after you sent this additional evidence?

Any advise or knowledge would be much appreciated!

Thanks... :)