When UnForm syncs its users and groups with Active Directory or other LDAP servers, it uses a Perl module referenced by the UnForm client, such as uf100c. The client requires one or both Perl modules that provide LDAP access. If you get this error message when trying to sync users, the modules are not available and need to be installed. They are:
Net::LDAP
Net::LDAPS
Net::LDAPS
Most Linux package managers can install Perl modules using a special syntax for the request. For example, if using Redhat or its kin, try:
sudo yum install perl-net-ldap
sudo yum install perl-net-ldaps
Use Google to search for installing modules on your flavor of Linux, if not Redhat.