You can't use the "vertical bar" (|) character in the names of Organizations. The pipe character is used in the Bulk importing users feature to associate users with multiple organizations.
A similar error is displayed when you try to save a Sandbox in which the Zendesk account contains this character (see Failed to create sandbox: Name must not contain the "|" character for more information).
Is there a list of all unpermitted characters?
The only unpermitted character is the vertical bar (|).
In any case, I look forward to an official article on the matter.
Thanks a lot for pointing that out to me. I think the way I wrote the Question in this article is not the best. This article is referring exclusively to the creation of organizations.
The only we can't use is the vertical line. I am going to talk to Joseph to get that list into an article.
Why are all of my agents being emailed when a new ticket is created?