I also tried with the email address, in fact nothing works : - firstname.lastname@example.org - Domain\firstname.lastname - firstname.lastname@Domain - firstaname.lastname
For the authentication mechanisms, here's a Microsoft link which explains all the available modes. In our case we are using the second one : "Forms-based authentication". http://technet.microsoft.com/en-us/library/jj219571(v=office.15).aspx#userauth
Here are two iOS applications that work with our Sharepoint farm today : "Briefcase Pro" and "Moprise : Sharepoint Documents"
I hope this will help you to understand our issue.
Thank you very much for the info provided! Unfortunately we don`t support form-based authentication yet, we only work with the NTLM-based authentication.
Would it be possible to change your settings for some time? We are going to implement form-based authentication, but it`ll be included into one of our future updates. Sorry for this temporary inconvenience!
If you have any further questions, please let me know.
I'm re-opening this thread after one and half a year. It looks like that web form authentication is still not supported for Sharepoint. Is this something you really intend to include in Outline, or not ?