We need to limit the blog names users may choose when they create their own blogs.
We have a WordPress Network configured to have all blogs share a domain name. E.g., domain.name.com/x, domain.name.com/y, etc.
We have integrated our WordPress Network with our corporate Active Directory using the Active Directory Integration plugin. That plugin puts the user's mailnickname attribute (the part of the email address before the
@) into the nickname field.
I would like to allow users to self-create their own blogs but restrict blog names names so that it must match the nickname field of their WordPress account. E.g., a user with nickname jdoe could only create a blog named domain.name.com/jdoe.
Ideally, on /wp-signup.php, it would be best if the blogname field doesn't even display.
Is there a way to do this without PHP customization? I was hoping a plugin would already exist, but I can't find one.