On the Home page, scroll down to the Linked Accounts group.
On the desired linked account, click the two vertical bars, then click Update Login.
Enter your updated User ID and Password, then click Continue.
Note:  Do not confuse linked accounts with external transfer accounts. In online banking, you can only display data about linked accounts. For external transfer accounts managed on the Add External Accounts page, you can transfer funds between accounts at your primary financial institution and external accounts after two micro-deposits are made to ensure your ownership of the account, as well as your financial institution's ability to move money to or from it.