LDAP authentication basically works for me, but User Email Attribute is a mandatory field in the configuration form. I'm no expert in LDAP... as it looks the LDAP subtree "User search base" that I need for authentication does not contain a mail attribute on the LDAP server I have to work with. The mail field is found in a different sub-tree that cannot be used for authentication. I'm not sure if that is a common setup but I cannot really change the LDAP server.

Is see various ways to address this:

• the mail field could be made optional
• a different LDAP search base could be specified for looking up the mail attribute
• a mail address could also be constructed from a placeholder string like "{0}@my.domain"