Are the servers downs for a second day in a row???
There is currently an Xbox Live outage that is affecting multiple services
https://www.halowaypoint.com/en-us/forums/6e35355aecdf4fd0acdaee3cc4156fd4/topics/xbox-live-outage-13-14-january-2018/327b0364-c689-40ea-b859-ef553573b918/posts