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eBay Integration
Under this tab, you can set the Conditions by which M2E Pro should automatically retrieve the changes you made to eBay.

Once the Revise Condition is enabled, the Module starts monitoring the changes made to this property in the relevant Policy Template and Magento Attribute set for this property in Policy Template. This means you spend less time and effort on configuring. Instead, you get more flexibility and accuracy in the processing of updates.
For example, if you enable the Revise by Title, any change made to the related Description Policy settings or Magento Attribute set for Title in Description Policy will initiate the automatic Title update on the Channel. If the Title condition is disabled, it will never be updated by automatic synchronization.
<aside> ⚠️ M2E Pro Listings Synchronization must be enabled under eBay Integration > Configuration > Settings > Synchronization. Otherwise, Synchronization Rules will not take effect.
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Here is the detailed description of each option:
Quantity - automatically revises Item Quantity on eBay when Product Quantity, Magento Attribute used for Item Quantity or Custom Quantity value are modified in Magento or Policy Template. The 'QTY' option is permanently enabled in Revise Rules and cannot be switched off. This means that QTY value will be updated each time after it is modified in your Magento.
**- Conditional Revise** - it is strongly recommended to enable this option to prevent the excessive impact on system performance. In the separate field, you can provide the minimum quantity value that will trigger the Item Revise:

The Item Revise will be triggered once the quantity either in Magento or on eBay becomes less than the specified minimum quantity value.
When conditional revise is disabled, M2E Pro will update even the tiniest QTY changes for the Items with the high stock levels (e.g. from 515 to 514), which are unreasonable and time-consuming. While more important changes (e.g. from 1 to 0) for another Item will be placed in a queue instead of immediate update.
If you synchronize your Magento inventory with the suppliers' stock which is changed quite often, the enabling of conditional revise is critically important.