Hello, @oknick
CF_INSYNC_POLICY_NONE = 0, it means non in-sync policy is set. However, CF_INSYNC_POLICY_PRESERVE_INSYNC_FOR_SYNC_ENGINE is a flag used to exempt all of the other policies. It can be a kind of switch or flag to temporarily disable the existing policies without removing the policies. Just set/clear the flag can disable/enable the in-sync policies.