I recently got the CC-800 error on most of my accounts, so to correct the issue per Quicken's advice I had to deactivate and then reactivate the accounts for online download. I was successful on all of my accounts except my credit card accounts at Citibank. When I go to activate the Citi accounts, the Quicken screen displays popular institutions to choose from. One of these is "Citi Cards" and another of these is "Citibank". I assume I should choose "Citi Cards" but when I do it takes me to a logon screen where my logon does not work. I believe this logon screen is for "Citibank" not "Citi Cards", and indeed when I click on "Citibank" it takes me to the same logon screen.
Without going through Quicken I've checked my logon at the Citi Cards website and it works fine.
Also I was able to reactivate these accounts a few weeks ago without a problem.