Authentication Policy

Hi Guys,

We recently migrated to QC 11.52 and our authentication policy was set up at the time of migration a few months back.  I've been asked if making amendments to the current policy would have an impact on existing passwords and I honestly don't know. 

Surely the changes to the policy would only affect new users and those who change their password after the policy has been ammended?

Would anybody know the answer to this or be able to point me in the right direction please? 

Thanks!