I got an email too this morning too. They invalidated my password. My session was intact, but a password reset was required on next login, and they encourage

I got an email too this morning too. They invalidated my password. My session was intact, but a password reset was required on next login, and they encourage two factor. I did that despite not really wanting linkedin having my phone number... When you change the password, you can click a box to inactivate all other sessions.