Controls the automatic addition of users when the authenticate_user script is undefined.
mlsrv10 -c "connection-string" -zu{ + | - } ...
If this is supplied as -zu+, then unrecognized MobiLink user names are added to the ml_user table on first synchronizing. If the argument is supplied as -zu-, or not supplied, unrecognized user names are prevented from synchronizing.
This option is useful during development to register users. It is not recommended for deployed applications.