The posted question asks when the beta will launch and on what platforms it will launch on. The posted answer states the following:

Of course, there has not been any official announcement from either Microsoft or Bethesda concerning this seemingly-exclusive partnership. It’s unknown if the two companies made some form of a deal for the Xbox One to get access first, but it’s worth mentioning that the Xbox logo appears before the official trailer begins on Bethesda’s official website. For those still interested in joining in playing Fallout 76 as soon as possible, here’s how to join the game’s beta.

While many fans are upset about the game being “online-only,” it remains to be seen how the community reacts to this news. Although the companies have side-stepped this relationship so far, it’s interesting that the limited timed-exclusivity of the beta wasn’t mentioned at E3 or elsewhere. Moreover, it begs the question, if the beta is a timed exclusive, what about post-launch content?

Fallout 76 is scheduled to launch on November 14, 2018, for PC, PlayStation 4, and Xbox One.