Microsoft sales folks ran around to all the large organizations with on-prem mail systems (both Unix based and Exchange) offering deeply discounted Office licen

Microsoft sales folks ran around to all the large organizations with on-prem mail systems (both Unix based and Exchange) offering deeply discounted Office licenses and free UNISYS contractors for migrations if the org would commit to moving to paid O365 seats. Lots of well built and managed systems were tossed out for short term discounts, locking people into a glorified version of Hotmail.