We discovered the same after installing the Turnkey Linux for Faveo Helpdesk in our Proxmox environment.
[Edit: Installing SERVICEDESK revealed the OAuth setting.]
We are trying to install Faveo Servicedesk in order to compare the features. We are under the impression that Serivcedesk is aimed at "enterprise" which would have more of a need for OAuth, whereas smaller organizations can use a traditional IMAP/POP setup.
Did you have any more luck finding the OAuth settings?
