It depends on the size of the course, how much is being synced and to how many courses. I suppose it also depends a little on the server load and how busy a time it is. In my experience it's usually only a matter of minutes, but I've seen as much as 15 minutes before. There was a minor disruption today with Canvas which could have affected how long it was taking though. Check out the status page here to see details https://status.instructure.com/
Rick
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