For those people who are using laptops, they can either use Outlook, properly set up, or use Outlook Web Access (web mail) to reach the server and their mail. If they normally access more than one account, use Outlook. You will need to make a decision as to the smart phones that you will support. .Supporting anything coming down the pike will make you grow old very quickly. If you are going to support more than one type of phone, then you may want to consider getting some Good (nae of the company) Software into the mix that allows you to provision a wide range of phones so that you can have a consistent set of rules across the user base, and be able to wipe phones in case of loss or theft.

You’ll want to license on a per user basis rather than on a per device basis. If Jane is using just her desktop at the office is no problem, but John needs access not only at the office, but on his laptop when he is on the road or working from home and via his smart phone. If you were to use per device licensing, that would be a total of 4 CALs, but per user, it is 2 CALs.Also, it is not licensed per mailbox, since one user can have several mailboxes. At least that is my understanding.

What are the differences between MS Online and your reseller?

Right now I have an older web base mail client that Outlook can pop with 150 email accounts. I have two networks and 2 domains setup. About 25 of my users pop the server on the lan. The other 125 remote users access the email server via a webpage.

I will have 30 or so users that will want to access Exchange via mobile devices, laptops and desktops wherever they go. I was thinking the other 95 users can use OWA.

It’s my intension to purchase a new box with MS Server 2008r2 standard and Exchange 2010 Standard 1 server. From there purchase a mix of device and user cals.

Do I need an Exchange cal for every user? Do I just need cals for every computer/user on the lan that uses Outlook? Do I need to double up and get a server and exchange cal for every computer on the domain?