Mortar continuously updates Shopify inventory levels from your POS. But if you are ever unsure about inventory accuracy or have a sale pending, you can easily trigger an inventory update to select variants to ensure that inventory is synchronized.

If you suspect a product's inventory is out of sync, the first thing to do is get it back in sync.

After a minute or two, if don't see the inventory update you were expecting on Shopify, there may be an issue with the product link to your POS.

Learn more: Updates to products are not showing up online

There can be several reasons for inventory that looks out of sync. Inventory for an individual product can end up out of sync if a return is improperly processed or someone manually adjusts inventory. The best place to start checking why is to review Inventory History reports.
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Both your POS and Shopify save logs you can review. Shopify provides a 30-day window of time to review inventory history. If you wait too long, it may not be possible to find out what happened.
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​Example: Lightspeed vs Shopify Inventory History

Learn more from Shopify's support page: Adjustment history

Did someone set a safety stock level or use the "noinventory" feature tag to support a flash sale event?
​Learn more: Inventory Settings
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Some third-party Shopify apps can overwrite Shopify products. If this occurs it can temporarily break product links Mortar uses.
​Learn more: Updates to products are not showing up online

If the steps above have not fully resolved matching up inventory to your online store, let's connect over chat to look at a specific example to figure out what's going on.
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