Maintenance for the week of September 30:
• [IN PROGRESS] Xbox: NA and EU megaservers for patch maintenance – October 2, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
• [IN PROGRESS] PlayStation®: NA and EU megaservers for patch maintenance – October 2, 6:00AM EDT (10:00 UTC) - 12:00PM EDT (16:00 UTC)
BUT, you may find problems when they come to do quests you've done, this game uses phasing extensively and it's common for people in groups to find they can't see the others if they're not all on the same stage of quests.
Group-play in this game is severely hit by the phasing tech. and although ZOS said over a year ago they were working on trying to make it better nothing actually has ever changed.