Bridge enables you to add end-to-end encrypted ProtonMail support to the email client on your computer. If you have multiple paid ProtonMail accounts (including sub-users created from a Professional or Visionary plan), you can add them all to Bridge.
To add additional ProtonMail accounts to Bridge, follow these steps:
1. In Bridge, click on Add Account.
2. Enter your credentials to add your account to Bridge. (Remember, you can only add paid accounts to Bridge.)
3. Now that your account has been added to Bridge, you must add this account to your email client. Step-by-step guides for each email client can be found here: https://protonmail.com/bridge/clients
You can now access multiple accounts in your email client.