I'll check it out, this might be awesome for some cases. But as for Org chart I still would like to directly access out Active Directory and not need to have a mediator in between:)
Thanks for your feedback on Visio custom visual. It would really help us if we knew exactly what is it that we can improve for your concerns. Please email TellVisio@microsoft.com or post suggestions to Visio UserVoice to make us better.
I can't get the visual to work. I do try to add a Sharepoint online visio digram, including complete url (with WopiFrame as well), but get an invalid url message.
Hierarchy Chart by Akvelon implements requested functionality.