Bethesda made a formal announcement on their website today revealing that Craglorn will hit live servers starting tomorrow when the game's first major update rolls out.
"We are very happy to announce that Update 1, including Craglorn, will hit the live servers starting tomorrow, when we’ll be bringing the servers offline to begin deploying Update 1. This update delivers new four-player quests and delves, more exploration, our first 12-player Trials, and a host of fixes and improvements," the announcement reads.
Additionally, servers will be offline for maintenance starting tomorrow at 8 AM EDT to prepare the roll out of Update 1 in North America. It will be 10 PM EDT for the European Megaserver. Players can expect Craglorn and the rest of the additions and fixes by the end of the maintenance period.
Be sure to check out our list of essential mods and UI addons for the game. Additionally, here's a guide to help you craft medium armor in the game.
The Elder Scrolls Online was released on April 4, 2014 for Microsoft Windows and OS X. It will eventually be released on PlayStation 4 and Xbox One later this year or in early 2015/