Prepare Replenishment

@dvisker You're not missing a setting. Warehouse is a required box on Prepare Replenishment, and the grid only loads items for that one warehouse. There's no "all warehouses" mode on that screen.

The cross-warehouse view is one step later, on Create Purchase Orders. It has a Vendor box, and its Warehouse box is optional. Pick the vendor, leave Warehouse empty, and you get the open purchase requests for that vendor in one grid, with the warehouse on each line. You can build the POs from there.

Two things to know. Create Purchase Orders only shows what's already been processed on Prepare Replenishment, so you still run that once per warehouse. It has a Vendor box too, which keeps each pass short. Processing there doesn't create a PO, only a replenishment request.

And check how your branch items are set up. If a branch item's replenishment source is Purchase but it also names a central Replenishment Warehouse, the request won't show on Create Purchase Orders. It goes to Create Transfer Orders instead, because the system expects the central warehouse to buy it and transfer it out. Only items the branch buys direct land on the PO screen.