Not sure if this is exactly what you are looking for but, with this plugin you can reset all your users passwrod which they’ll be notified via email.

https://www.ads-software.com/plugins/emergency-password-reset/

Check it out, hope it helps.

Mushmellow

Hi… cheers. I don’t want to change the passwords. I want to force people to change their email addresses.

Ryan

i am looking for the same plugin as i have around 1000 users that i need to change email address.