Email address as rdn in Active Directory Application Mode - ADAM

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http://serverfault.com – Is it OK to use an email address as the CN attribute in ADAM (I don't mean the email/mail attribute)? I have a requirement that calls for ADAM for authentication and the user's email address as the CN (e.g. CN=[email protected] and CN=[email protected]). It seems odd to have an "@" character in the CN property but I tested it and authentication works fine. I can't find anything online to suggest an email address should not be used as the CN except that and ADAM CN cannot have more than 64 characters which could potentially be an issue in rare cases. Also, Softerra LDAP browser won't allow me to ad (HowTos)