How to mark an object not to sync:

1. Select the desired object (for this demo, we'll use vendors)
2. Select the vendor name
3. Select the three dots and Select Check sync status
4. Uncheck Sync to accounting software
5. Select Save
6. Sync again to complete the update

Things to know:

When marking an object not to sync, if the object (such as a vendor) has never synced to the accounting system before, newly created transactions associated to that object will generate a sync error. If the object (such as a vendor) has previously synced to the accounting system, transactions associated to that object will still sync.