It looks like there was a change to the Discover Card Express Web bank feed which requires the deactivation & re-initialization of the bank feed (see https://quickbooks.intuit.com/learn-support/en-us/help-article/bank-connectivity/switch-direct-conne...).

Unfortunately, I am unable to deactivate the bank feed. When selecting "Deactivate all online services" from the Bank Feed tab of the Edit Accounts screen I receive the message "Your attempt to de-activate account failed. Try again after some time. If this error persists, contact your administrator" (Screenshot Attached).  I'm the administrator so that's not helpful.

I tried the steps listed at https://quickbooks.intuit.com/learn-support/en-us/help-article/bank-connectivity/fix-issues-deactiva.... None of these resolved the issue. Solution 3, the IIF import results in an error indicating QB ONLINE "It's a list or transaction that is not supported by the IIF import process."

A verify & rebuild finds no errors, nor does the File Doctor.

There are no pending transactions awaiting approval or deletion. If I select the refresh button for the bank feed I receive the message "You're no longer connected to Discover Card Express Web. Set your connection again to continue using bank feeds." (Screenshot Attached).  Which I cannot do until I deactivate the bank feed.

If I create a new Credit Card account & try to configure the Discover Card Express Web bank feed I receive an error that I used a different Customer ID to setup another QB account for online services with Discover (Screenshot Attached).  I am using the same Customer ID. 

If I create a new Credit Card account & merge the existing discover card account, I can break the link to the bank feed.  But this leaves an orphaned bank feed in the Bank Feeds window which still cannot be removed.

Does anyone have any idea how I can fix this?