We have 6000+ active domains right now. With the domain sync cron set to run every hour (the most frequent available setting) and syncing 50 domains only it will take it roughly 5 days to sync them all.
Allowing us to run it more frequent and/or sync more than 50 domains at a time would be super helpful.
WHMCS Team Clarification:
To benefit the most number of users, we're adding this clarification that the request's scope is being broadened to allow customisation of the domain sync batch size.
Allowing the batch size to be customised, could simultaneously meet the needs of users who need to sync fewer than 50 domains and also users who need to sync more.