Absinthe and my Exchange Server?

[Blackfeet]

As stated in other threads, new iPhone user here, and as a previous BB 9650 user who truly loved the hybrid, I am looking a JB'ing my 4s, for all of the obvious reasons I have downloaded absinthe-win-0.2, and read through the tutorials, but I still have one more question.

I am on an exchange server for Groupwise mail and calendaring. If I JB my phone, do I lose this like I would with a BB and a BES server? Would the connection be restored automatically once the JB is completed? JB'ing my work-issued 4s is not within the rules of use, so to have to call them and get back on the exchange server would be bad juju if I dropped it due to a JB.

Thanks in advance...