> Sorry, I meant $20 per user per month. But it should be cheaper I understood you: The cheapest Enterprise Mobility + Security license is ~$105 per year. A

> Sorry, I meant $20 per user per month. But it should be cheaper I understood you: The cheapest Enterprise Mobility + Security license is ~$105 per year. A Windows user CAL is ~$10 per year. To be on-prem requires a physical server; if a $10k server lasts 6 years, thats ~$1700 a year to do more than AD but let's assume 100% of costs are for AD. Also, the Windows Server license (depending on purchase method) is ~$100 per year. Up until 18 users, the server investment is more expensive. [18 * 10] + 100 + 1700 = 1980 versus [18 * 105] = 1890. At everything above 19 users, EMS is more expensive, 1990 vs 1995. Note that this comparison is very slanted in favor of EMS licenses. A $10k server is more expensive than most small business have and 100% of the cost isn't actually for hosting AD (domain controllers are generally lightweight and non-resource intensive). In reality, it becomes cheaper at something closer to 8 users, which covers most small businesses that are more than just a personal laptop and a point-of-sale terminal/CC machine.