Symptoms
Anonymous Access form submission redirecting to O365 login when submitting a form built off of an appified library.
Diagnoses
The OOB 'K2 for SharePoint Message' form that autogenerated forms like to redirect to is not set to 'Anonymous Access' which causes the browser to navigate to a login page.
Resolution
A brief rundown of the workaround in the ticket but for a more thorough explanation please consult this community article:
http://community.k2.com/t5/K2-Appit/On-Anonymous-Access/ta-p/74759
For the issue of redirecting to an O365 login page we need a form that displays "Form has been successfully submitted" to the end user. Since the rule that comes on the autogenerated form is pointing at a form that cannot be edited we have to make a copy of that for, set it to anonymous access and then point the rule of our autogenerated form to our new "Form has been submitted successfully" form.
