If you use Universal Passwords and if eDirectory LDAP is not NMAS-aware, users are able to log in to TeamWorks with case-insensitive passwords even though the passwords are actually case sensitive. For example, they can log in with 'p@$wrd1!' when their password is 'P@$Wrd1!'
In addition to the security concern, when users log in with the incorrect case, they cannot upload any files.
To prevent users from logging in to TeamWorks with an incorrect password, set eDirectory LDAP to be NMAS-aware by following the instructions in this TID.