Theoretically, marking an account as closed in Quicken should have correctly deactivated the connection when you marked the account as closed ... practically, there could have been a bug or problem communicating with the servers which prevented this from working ... I can only guess. Maybe the following helps ...
Let's do some "Troubleshooting 101" to ensure the Quicken software is installed and updated properly and that your data file is in good working order. Please perform all the steps in this document in the order specified:Troubleshooting 101 - Fixing Software Installation and Data File Problems
GeezerGeek said: OK, after searching further through the community responses, I found a means to fix this: Create an new account, Move all transactions from old account to new account, and then Delete old account. That worked but when moving the transactions from the account, Quicken prompted to confirm each moved transaction and told me that the linked transactions would be deleted even though I had selected all of the transactions and did just one Move transaction. I was concerned about the message stating the linked transaction would be deleted but it all worked out. Fortunately, the account didn't have many transactions so it didn't take too long for the transfer. Maybe there is a better way for transferring multiple transactions than the method I used but it worked. Hopefully, I won't encounter this problem again.