As Interim Head of Management Information Services at a SE Asian national carrier, I had a visit from Microsoft. They wanted $1.2m in licence fees. I advised them that our computers were leased variusly from IBM and Dell and they should contact the local agents concerning the operating systems. We reached agreement that they would waive previous fees for using MS Office but would pay for it "going forward". As soon as they left I had the network manager investigate how many users needed pivot tables in Excel. These users then continued to have MS Office. We replaced the application with Open Office on all other machines. This reduced our annual Microsoft licence to just 245 CALs and wiped a million bucks off the bill.