My understanding is that you will be able to do a Sister Search in the Members Only Section. I don't know what information you will need. Confusion may reign when you look up a maiden name and they only have last and vice versa.
I hope that it is accurate, but unfortunately, having learned from being Perm. Secretary for my Alumnae Chapter, if a sister doesn't tell her chapter and/or IHQ where she is, she is probably "lost". I know that from looking at the list that I have, some of the Initation addresses from years ago are the only ones that IHQ has.
Side note, even if you don't "house-move", let your Perm. Sec. know when you change emails! I could get a "valid" email one week and the next week, it is "undeliverable".
Is November Alpha Gam time?