Select an in-store topology

This article provides an overview of the various Microsoft Dynamics 365 Commerce in-store topologies.

Supported capabilities when connectivity is lost

Operation	Without connectivity to Commerce Scale Unit (in Store Commerce app offline mode)	Without connectivity to headquarters (Commerce Scale Unit (self-hosted))
Cross terminal shifts (such as view, suspend, resume, close)		✔
Cross terminal transactions (such as view, suspend, resume)		✔

For a list of operations that the POS supports when it loses connectivity to headquarters, see Online and offline point of sale (POS) operations.

The Store Commerce app supports mass deployment, but Commerce Scale Unit doesn't. For more information, see Mass deployment of self-service components.

You deploy the following components through a single installer. You don't need to install them individually.

Deployed component	Component type	Notes
Store Commerce app	Windows Application	The Store Commerce app running on the register.
Channel Database	SQL Database	Register specific Channel Database instance hosting data for the register.

Installed component	Component type	Notes
Commerce Scale Unit (self-hosted)	Internet Information Services (IIS) Web Service	Scale unit specific Commerce Scale Unit (self-hosted) instance used by one or more stores.
Channel Database	SQL Database	Scale unit specific Store specific Channel Database instance hosting data for one or more stores.
Async Client Service	Windows Service	Component to synchronize primary record data from the headquarters to the store and transactional data from the store to the headquarters.
Store Commerce for web	IIS Web Service	Store Commerce for web application that hosts POS functionality through a web browser.