ByteStand MCF Shipping may be unable to sync your inventory due to many reasons. The good news is that this is easy and quick to troubleshoot and resolve.
The issue could be:
Lets take a moment to check each option.
ByteStand MCF Shippings main goal is Order Fulfillment. To check if you have Sync enabled go to the home page of the ByteStand MCF Shipping app. It says ‘What would you like to do today?’
If you have a Sync button then Sync IS enabled and you need to move to the next step.

If you do not see a Sync button on the home page you are not paying for Inventory Sync. Please keep reading.
Now a ‘Sync’ button will appear on your home page. But, you are not finished. Here is a quick video that describes each of ByteStand MCF Shipping’s add on features including Sync and how to enable it.
A common issue after ensuring that your Sync is enabled is to also check that the apps Sync Settings are active! The app does not automatically start syncing your products information once Sync is enabled. The store must set up the Sync Settings in order to tell ByteStand which SKUs/products the app should sync and if the app should sync product list prices and/or product inventory.
It is vital that the product SKUS in Shopify match their EXACT Amazon SKUS. This is the primary way that ByteStand tells Amazon the correct products to pick, pack, and ship in your MCF orders. The app does not use product FNSKU, ASIN, ISBN, barcodes, etc. Just ‘SKU.’
If the SKUs in Shopify are incorrect there are two options:
The store must own the products they are attempting to sell. The products/SKUs must exist in the Amazon Seller Central account for FBA inventory sync to be successful. This ii not compatible for drop shippers, FBM, vendors, print on demand, pre-orders, etc.
ByteStand MCF Shipping can only see and sync FBA products which are assigned to the connected Amazon Seller Central account. The products must also be in a Available status with Available inventory. Or FBA inventory sync cannot work successfully.
The below are NOT ‘available’:
If you ONLY need FBA product inventory and/or sync ability you should look at our SnapSync app below. .
As you may not need ALL of the features of the ByteStand MCF Shipping app
Here is SnapSync in the App store https://apps.shopify.com/simplesync-amazon-fba-sync