Is it possible to outsource BES but not Exchange?

I'm pretty sure I already know the answer to this but I thought perhaps there were new developments of some miraculous sort since I last researched this.

Long story short - we're a medium sized nonprofit organization.  Our head office branch uses SBS 2008 with Exchange 2007 for email.  It's been working delightfully, even if Exchange is a bit of a resource pig.  There are 11 people on the Exchange server, and 4 of those people are using Blackberries with the Redirector.  It's been working fine for the most part, but my CEO really needs access to his email all of the time, and our new home in a new office tower has been having planned power outages fairly frequently.  Part of the reason we moved in here was because they had a generator for backup power but it seems like they've been bringing that down as well.  As a result, it leaves us without access to our email because they need to turn off their computers over night since that's when the outages occur.

Now I've considered using  BES Express for our Blackberry stuff, but it doesn't eliminate the fact that our power goes out.  The server is on a UPS of course, but not enough of one to hold it for more than an hour at best (and that's being generous).  I've also considered outsourcing Exchange and BES but that's an expense I'd rather avoid since again - we're a nonprofit and all the pennies add up.  That's why i was hoping I could just take the Blackberry users out of the picture and leave the Exchange server running for everyone else because that would at least reduce the cost.

Thoughts?  Suggestions?  Things I didn't think of?
JoniCAsked:
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mattclarifiedConnect With a Mentor Commented:
You wont be able to have hosted BES and onsite exchange, no way, no how!
You can have BES express installed on the SBS server and use it that way, I see your point about the power outage affecting this, but surely this would knock exchange out as well, so you wouldn't be any better off having the BES offsite.

Have you considered hosting the server at a data centre somewhere (server colocation), you could then load BES express onto the server and have it stored offsite, and have guaranteed power to it all the time.

M@
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Jamie GillespieSenior IT ConsultantCommented:
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JoniCAuthor Commented:
We use OWA as well but some of our users are rather attached to their Blackberries.  And yes, you're right about Exchange going down as well when the power goes out.  I'm guessing there's no way to farm some of my Exchange/BES accounts out, while keeping the server running for the non Blackberry users without getting a new domain for use on one end or the other?
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