I am using Net::LDAP to search Active Directory for a certain user ID and return their cn and lastlogintime attributes. Here is my code:

foreach my $uid (keys %results){
        $search = $ad_ldap->search(
            base   => 'DC=company,DC=domain,DC=lan',
            scope  => 'sub',
            filter => "(&(cn=".$uid.")(objectclass=user))",
            attrs => ['lastlogon', 'cn']
            );

        # if no results were returned, set ad_lastlogintime to 0 and g
+o to next uid
        if ( $search->count == 0){
            $results{$uid}{ad_lastlogintime}{0} = 1;
            next;
        }
    
        # store the AD last login time in the uid hash
        foreach my $entry ($search->entries){
            $results{$uid}{ad_lastlogintime}{$entry->get_value('lastlo
+gon')} = 1;
        }
    }
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The problem is this: there is a uid in AD that when I search for it, the search does not return anything. $search->count is equal to 0, so I just set the lastlogintime to 0. The ID that I am searching for is definitely in AD but for some reason it does not find it at all when it searches for it. We think the issue may be the possibility that the ID is actually a reference. From what it looks like, I might be able to get the correct result if I just don't try to dereference the object (ID) when I search for it, however I don't know how to do this. I realize that are several Net::LDAP modules that deal with this and I looked at them but I really don't understand them. If anyone has any ideas, I would appreciate a little help. Also, I know the information is a little sketchy here so if you need more, please let me know. Thanks!