Unable to invite users by email when using option 2 and option 3 to an organization. It gives an error: "Unable to send invites to the following email addresses."
Last Published: October 10, 2014ArcGIS Online
Bug ID Number
October 6, 2014
August 21, 2020
This issue was not reproducible when tested by the development team. Issues may be given this status when they cannot be reproduced or are no longer relevant in a development version of the software, but a specific fix was not installed to address the issue. The issue's Additional Information section may contain further explanation.
Fixed today about 2:30pm PST.
Use the first option to manually add the username and password directly to the organization.