I have two Direct Connect accounts (Fidelity Investments). The rest are Express Web Connect. Direct Connect accounts require website passwords to be stored in Quicken. I use the Password Vault for them. When I start One Step Update, "Enter Vault Password" pops up, requiring the password, which I find very annoying.
It's unnecessary. Quicken could skip the pop-up, as it does with Express Web Connect and immediately start the update. If I need to access or edit the vault or passwords, I can use the current Tools > Password Vault access that requires the Vault Password.