It would be great if we can schedule the synthetic full apart from the normal backups; or at least give or backup priority over synthetic full.
We currently have 15 jobs (Incremental) and every saturday we create a synthetic full (using ReFS fast clone, per vm backup chain)
The synthetic full starts at the end of the backup job, but can block other jobs from making the backup (since the repository concurrency is reached).
To have maximum control it would be great if we can schedule the synthetic full apart from the backup job. So we run the backup jobs (incremental) and we schedule an synthetic full later.
An alternative would be to give the synthetic full operation a lower priority; so that backups will always be finished first and synthetic fulls will be made afterwards.