Exchange 2010 Inhouse vs Hosted

Hi, we are moving to an Exchange 2010 environment - but we are deciding on if we want to have it inhouse manage it by ourselves OR get it hosted at an external hosting company
we have 150 users over 4 geographical offices 3 in Canada and 1 in the U.S.

any ideas or recommendations or pros/cons to each?

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Hendrik WieseInformation Security ManagerCommented:
Have a look at the following link, it should help make your mind up:

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Madan SharmaConsultantCommented:
There are lots of article on this. Both have their own pros /cons if look as financial then hosted is good but if look for security reasons in house is good.
check this article:-
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