How to logon to multiple AD using the same Username?
The following procedure is for a user who has access to multiple Active Directories, and wants to login to a specific Active Directory.
Procedure:
Go to System login page.
Enter your username in username@domain_name format wherein domain_name refers to the respective Active Directory name.
Enter your password.
Click on Login.
Make sure that you have access to the AD you want to login to.