I recently added my GM Financial account to Simplifi, no problem there. However, as I have been using Simplifi since then, I am prompted to enter a 2FA code. The issue is that Simplifi will request two times, so I will receive two 2FA codes in my email, but I have to use the second code.
The issue seems to be that when Simplifi tries to log in, it generates a 2FA request command. At the same time instead, I am prompted through Simplifi UI to request a 2FA and how I want to receive it. The only option is email, so when I click 'Next' another 2FA request is sent to GM Financial. I can then enter the second 2FA code into Simplify and the account will update. This also happens when I open Simplifi on my Android phone.
Ideally, it would be great for Quicken to work with GM to eliminate 2FA when trying to update the account in Simplify. But the short term solution should be for Quicken to prevent multiple 2FA requests.