GitHub - feudalnate/Original-Xbox-LIVE-Account: Functions for signing/verifying original Xbox LIVE account data. Also a tool to read/write accounts from/to files, FATX backup images, or FATX formatted devices. Reversed from XOnline and kernel API's
How to connect Offline Xbox 360 Account to Online Xbox Live Account - YouTube
How to contact support to fix "This Xbox Live Account is already used with another Steam account on Microsoft Flight Simulator" – Microsoft Flight Simulator Support