I have a downstream Chris21 system with outgoing provisioning enabled. After an Import All on the corresponding Connector from Chris21, a number of changes were reflected to Chris21 Adapter, for users who were not joined to Lockers. Those changes became Pending Incoming Sync Changes, and now every time Changes Synchronization runs they are marked as Incomplete and they are "stuck" and won't go away. Since Changes Synchronization is configured to run every 30 seconds, this is leading to extra unnecessary processing.
I suspect a Baseline Synchronization will clear the issue, but I am awaiting further instructions and have not run it yet.
Matt suggesting using $denySync as a workaround to stop the system from processing those Pending Incoming Sync Changes, however the task doesn't seem to have visibility of those change objects. Refer https://voice.unifysolutions.net/communities/6/topics/3862-no-entities-available-in-sourceentities-targetentities-or-joinedentities-powershell-incoming for a ticket raised to address that problem.
Customer support service by UserEcho