If you've downloaded a Dynamics 365 for Operations / AX7 VM for development — especially for Retail — start with Microsoft's access-instances guide. Skip the Retail Configuration section in that link and you'll run into errors like:
- In MPOS, trying to activate fails with: "The service is not provisioned for the same tenant. User is hitting a retail server that does not belong to the same tenant as the Activation account."
- In AX, trying to associate a user identity with a worker fails with a "service is not reachable" error.
Both are symptoms of the same root cause: the Retail Configuration steps haven't been completed for the tenant.
If you're hitting this on an LCS-hosted VM, you'll also need KB3170424 installed.