You are spot on. Exchange Online is $4 per month per user for 25 GB mailboxes. Office 365 is $6 per month per user. They also pay commissions to Microsoft Pa

You are spot on. Exchange Online is $4 per month per user for 25 GB mailboxes. Office 365 is $6 per month per user. They also pay commissions to Microsoft Partners each and every month. I work full time at an investment bank but I've helped several local companies (about 500 seats) to move from on-premises Exchange to Office 365. It's a ridiculous no-brainer for them. Most of them paid more in annual maintenance for their spam firewall than Office 365 charges them. There were some growing pains as they moved from Microsoft BPOS to Office 365 but it works tremendously well now and all the early kinks have been ironed out as far as I can see. Oh, and outlook.com is completely free and works with user domains.