Tweet from Halo Support:
https://twitter.com/HaloSupport/status/1519123262327775232
Ahead of Season 2’s launch at 11am PT on May 3, online services for #HaloInfinite will undergo maintenance starting at 10am PT. These services will be available when the Season 2 update is installed. Stay tuned here as we’ll announce when Season 2 is live on all platforms. (1/2)
During this 10am-11am PT maintenance on May 3, #HaloInfinite will launch in an offline state. Online services and modes such as multiplayer, Academy, and customization will be inaccessible. Campaign will be available during this maintenance window. (2/2)