U.S. users attempting to access Microsoft services with multi-factor authentication are facing disruptions, with many encountering a 504 gateway time-out error. The tech giant is actively investigating the issue that's preventing normal access to these protected services. According to reports from Jin10, the problem is widespread among U.S.-based users, affecting those who rely on MFA-secured platforms. Microsoft teams are mobilizing to resolve the situation, with the company committed to restoring full service accessibility in the near term. The 504 error typically indicates a server communication failure, meaning users' requests aren't reaching the authentication systems properly. The company hasn't disclosed exactly when normal operations will resume, but they're treating this as a priority issue requiring immediate resolution.