Set POS Status
Set POS Status lets you set POS sales to Archived status if you are using Since Last. This sounds cryptic but makes sense if you use 3rd party tools for order fulfillment.
Since Last gets new orders using Shopify ID's, so without setting Orders to Archived, which may help with order processing. If you still want POS set to Archived you can.
Then your 3rd party tools can process orders using the Status and setting to Archived. POS in-person sales can be set to Archived if they do not need this same processing.
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