Xbox Chief Technology Officer Scott Van Vliet, who was praised for his transparency following the major Xbox outage that left some users unable to play games - discs or digital - is back with another update. On July 28th, Van Vliet stated that a "licensing service that sits outside of XBOX" caused the server crash that lasted roughly 20 hours. This was compounded by a bug in the XBOX client software stack, which caused other license checks to also fail when that first service went down. Van Vliet went on to explain what actions have been taken, including a shift in ownership from external services to the Xbox team, ahead of a client bug fix that began rolling out today. The client bug has been fixed in an upcoming release, which starts rolling out today, August 10, and becomes mandatory August 17."