https://www.group-office.com/wiki/Z-push_2.1
php z-push-admin.php -a list -u {go_username}
throws
PHP Fatal error:
The license file /DIR/TO/GO/groupoffice-pro-5.0-license.txt
for /DIR/TO/GO/modules/z-push21/backend/go/go.php
is not valid for this server.
in Unknown on line 0