Since Appian is case sensitive.
So my requirement is if I select a user "Radha" then it gets created but again if someone tries to create a username in lowercase"radha" then it should not get created.
Do suggest how to check it.
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How do you plan to create users? In admin console you can not check that. Using a process it should be simple to just validate against existing users and might need a combination of OOTB functions and plugins. If you do that through LDAP or SSO this is managed elsewhere.
You'd probably be interested in the function isUsernameAvailableForNewAccount() found in the Personalization Utilities plug-in. Beyond that, if some usernames in your system will be hand-entered by other users, I strongly suggest forcing them to either all lowercase or all uppercase, to remove some of the guesswork.
Thanks..have created a PM from where am creating new user..
Thanks..