Authenticating to the correct realm automatically
When the BMC application user logs on to a BMC application URL such as https://company.bmc.com/arsys or https://xyz.onbmc.com/arsys, for the first time, the login page prompts the user to enter a domain name based on which you are prompted to enter your log on credentials for your realm. The user can either enter the domain name as domainname.com or enter the complete email format name such as user@domainname.com for authenticating to the correct realm automatically.
After the users have entered a valid domain name, the browser is redirected to the BMC Atrium Single Sign-On server log on page where they have to enter valid credentials for their realm. After successful authentication, they can access the relevant application. Additionally, the domain used for authentication is verified with the domain specified in the your username. For example, the web agent verifies the request with username user@domainname.com against the correct realm. If the credentials pass this validation, this domain is used for authentication during subsequent next log on requests.
The following image displays the domain name field.