Reference providers and reviewers may not have to sign in on the References/Reviewers tab if they have also been provided campus credentials, meaning that they are connected already to the institution, and if you have implemented Remote Identity API.
Where does a reference provider or a reviewer need to sign in when they have campus credentials? Where should a reference or a reviewer sign in when they have been assigned a UID by their institution? Should a reference or reviewer sign in on a different tab if they have a user ID?
If you have implemented Remote Identity API, any Reviewers or References who do have campus credentials (a UID/user ID) should sign in on the Applicants/Administrators login tab using these assigned credentials.
An administrator may want to update the custom text sign in instructions for these users at Site>Settings>Custom Text>"Reference and Reviewer Sign In Instructions".