Hello,
Thank you so much for posting here.
Currently Maximum password age is set to 0 days, which means that password will not expire. If we set it to be 30 days, many people will have their password expired immediately when the new password age policy is applied. It'll affect anyone who has a password aged 30 days or older. They'll have to change it. Yes, it will be counted from users "pwdLastSet" value.
There is an exception when the user account is set to "Password never expires". The setting in user properties will overwrite the password policy.
Hope the information is helpful. For any question, please feel free to contact us.
Best regards,
Hannah Xiong
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.