AX for Retail R2 - How to run POS in offline mode?

If the POS system disconnected from the back end AX system (e.g: network disrupt, router hardware issues, etc) then it may display following error when you try to login to your POS system:


This error is not refer to multiple logon issue. I guess the POS system try to validate the staff profile with store number, and verify against "AllowMultipleLogins" value which only exists in AX back end DB. It will failed due to AOS/RTS are not reachable.

Solution:
Marked the “Continue on TS errors” at HQ > Setup > Staff > General tab