Message when you try to log on to a Microsoft Dynamics CRM Online organization: "Your organization has moved

Recently our CRM 2015 Online has updated by Microsoft.

Few subscribers couldn't connect after it got updated.
After 24hrs the issue has resolved.
https://support.microsoft.com/en-us/kb/948661
http://www.mynetworks.me/2015/07/28/microsoft-crm-online-updates-cross-reference-dns-issue/