Hi @BadBernie,
Welcome to the TeamViewer Community! ๐
Usually, the account password remains the same after changing the email address successfully within the TeamViewer system.
If you would like to change the password, there is an option for password reset on the account login page (shown in the screenshot). After inputting the email address on the password reset page, TeamViewer will then send out the password reset link to help you to generate a new password.
For more information about changing your email address and account password, feel free to check out our Community article - Change your account information ๐งพ
If you want to sign in to the updated email account on the new device, the email of the trusted device should send to the inbox of the new email address.
Let me know if the information above is helpful and wish you a nice day!
Best,
Ying_Q