two options that you have
you can setup a really crappy computer thatis not being used anymore and have it run the redirector so you can take your laptop with you (this will be dependent on the IT department and thier willingness to do so)
If you are the only one at the moment you may want to look into the small business edition of BES it is a lot cheaper than the full thing.
My company used the old computer method until i was able to talk my it managers into letting my buy BES.
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