1. Log in to the Environment Hub, and then select a member org. If you don’t see any member orgs, check your list view.
2. Go to SSO Settings, and then choose a method.MethodStepsSSO Method 2 - Federation IDSelect the checkbox.SSO Method 3 - User Name FormulaSelect the checkbox, and then define a formula. For example, to match the first part of the username (the part before the “@” sign) with an explicit domain name, enter:LEFT($User.Username, FIND("@",$User.Username)) & ("mydev.org")
3. Select Save.