Ah, so Exagrid is the target for your backup copy job, not the original backup job. Then you do not actually have a choice between active or synthetic full for it, only active full is available. To perform it, you need to enable GFS retention ('Keep the following restore points for archival purposes' check box), configure weekly backups, and enable active full (select the 'Read the entire restore point from source...' check box). This way, backup copy will behave as forward incremental job with periodic active fulls, avoiding any transforms. On the original backup job you can set anything you need, this does not affect backup copy job.