Hello @mbinday,
Thank you for reaching out to the Quicken Community with this question.
I recommend navigating to Audi USA's website and looking into the settings for third-party access. The MFA security code comes directly from the bank's servers, which Quicken does not have access too. You can also call their customer support for more information, with that, it is recommended to request to speak to a tier 2 agent or supervisor as they are generally more familiar with third-party applications.
I hope this helps!
Just my 2cents' worth … I would not bother attempting to activate any loan or mortgage accounts for downloading. I would just simply set them up as "offline" (manual) loan accounts with a Scheduled Reminder to record the monthly payment from your checking account. (Not discussing LOC or HELOC accounts here. They should be set up as offline credit card accounts)
At least in Quicken for Windows, an online-connected loan or mortgage account does NOT have a transaction register. All data shown in the account come from whatever information the bank downloads to you ... if this process works at all.
As a result of being connected, the scheduled payment transaction reminder cannot transfer the amount of principal paid into the (non existent) account register and must use a category, usually something like Loan:Principal, instead. The category name seems to vary with the Loan Type you selected when creating the loan account in Quicken.
Effective with Quicken Windows 2018 and newer you can deactivate an online-connected loan account and regain full control over your transaction register. However, you should still review the Scheduled Reminder (or Memorized Payee List entry) associated with the monthly loan payments to ensure they now transfer Principal to the loan account register and not to a Category.
If you're a Q Mac user, you should be able to do something similar about setting up and maintaining an offline mortgage account together with a correctly calculated Scheduled Transaction Reminder for the monthly payments from your checking account.