To disable a connected account from bank feeds, navigate to Cash Management > Accounts, and select the bank account you would like to disconnect. Hit 'Edit' and navigate to 'Banking Cloud'. From there, hit 'Disconnect'.

Once you have confirmed the disconnection, the status will update to 'Disconnecting. The status may stay like this for a couple of minutes.

Once the account has been fully disconnected, the status will revert back to 'Connect'. You may then start the connection process again.
