If you are planning any weekend upgrades between 10 pm Friday June 7 and 12pm ET Sunday June 9 that require Atlas access you should be advised that the system will be unavailable due to maintenance. I believe this is in advance of the upgrade due to go live Monday June 10.
Maintenance Notification
System maintenance will be performed on the Partner and Customer Portal from Friday, 6/7 at 10 PM ET until Sunday, 6/9 at 11:59 PM ET. The portals will be offline during most of this period.