How to restrict allowed username characters during registration?

Is there a configuration menu somewhere or can this only be done with a rule?

Hi,

Welcome to Community,

Would you please share more details, what exactly you want. I mean you want to limit number of characters or want to block specific characters?

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Sorry, I didn’t receive an notification and just saw the response now. We want to prevent user from using the symbol @ and maybe one or two other symbols for their user name. Since we are using the universal log-in, we have no way to enforce what username user can pick during registration. I was wondering if there’s a way to perform custom validation (i.e., check for existing of @) of candidate usernames before allowing user to register. Currently, we disabled usernames entirely due to this reason.

Hi,
If you are using universal login then you can get the UI input fields by enabling toggle Customize Login Page. There you can check these characters and can show error to user if he try to input those restricted characters.

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Thanks for sharing that with the rest of community!

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