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Pros and Cons of hosting Exchange In-House

I have to submit a proposal to have Exchange hosted in-house. I need as many Pros and Cons as I can get.
Right now, this is what I have:

Pros:

1.      Full control and management over every aspect of Email services.
2.      One-off capital cost for server hardware and software
3.      Data is secure
4.      Flexibility with accounts
5.      Spam and Virus control
6. Integrated with Active Directory
7. Great support

Cons:

1. Maintenance upkeep
2. Time Consuming to setup as compared with third-party hosting
3. One point of failure (for a one-server solution)

Again, I would like to have more to put here, but I'm not sure what I am missing, if anything at all. So, all the pros and cons you can think of...

We have looked at third party hosting as well, but of course, i favor this solution just because I want it in-house.... but I need more than that!

The solution I'm proposing is attached....

Thanks in advance for you help!
Exchange-HW-SW-Quotes.xls

ASKER CERTIFIED SOLUTION

TSchug

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kieran_b

Scheduling and calendaring should be a pro for both - exchange hosters will still give you access to it.

I would argue the point about cost too - while hosted exchange looks cheaper, it will work out more expensive over the longer term.

I would be looking at SBS or EBS 2008, it will be a cheap entry point.

The main reason to go hosted over internal is support - if you know exchange and can manage it, then that kills that