[Q] Rooting Before or After ActiveSync setup?

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http://forum.xda-developers.com – Hi there, I tried to search for this and couldn't find a good answer so I apologize if this has already been asked. I just got the T-Mobile Galaxy S III. It's my personal device but I use the Microsoft Exchange ActiveSync to integrate my work email. They have a security policy enabled which won't allow the phone to work until I submit paperwork and it goes through the correct channels. My question is... I'm interested in rooting my device, but don't know how this will impact my ActiveSync authorization? I know replacing my phone even if its the same phone will break ActiveSync but I'm (HowTos)