I get this problem, when trying to connect to Windows Azure hosted server from my Mac OSX Filezilla FTP Client:
220 Microsoft FTP Service
530 User cannot log inError: Critical error
Error: Could not connect to server
This only started happening as of October 29, 2013. Prior to that, I would get a "Critical error" every now and again, but was always easy to refresh and upload without haste.
I tried CyberDuck and it told me to contact service provider, but has anyone found a solution to this?
We use Windows Azure to host our site, and I run Mac OSX. Surely, this would have always been a problem before and not have just sprung up recently for this reason alone (Windows vs Mac) right?!
Please see: Servicedashboard Windows Azure at http://www.windowsazure.com/nl-nl/support/service-dashboard/
You can find more details on the issue and a possible workaround here http://social.msdn.microsoft.com/Forums/windowsazure/en-US/b2853874-160f-4156-bd0a-0247cac04831/cannot-connect-to-azure-websites-ftp-server?forum=windowsazurewebsitespreview