You are not allowed to set REMOTEDSMAGentnode option. Data Protection for Microsoft SQL Server is not licensed to perform offloaded VSS backups.
The REMOTEDSMAGentnode option is used to perform offloaded VSS backups.
The operation stops.
In order to perform offloaded VSS backups install a valid fully-featured license. If you use Data Protection for Microsoft SQL Server it is also required to purchase and install IBM® Tivoli® Storage Manager for Copy Services - Microsoft SQL VSS Integration Module. Contact your service representative to find out purchase details.