Hi @Vanessa Farias ,
Thanks for the post!
Yes, if you have Enterprise Mobility + Security E3, that includes Azure Active Directory Premium P1.
Self-service password reset/change/unlock with on-premises write-back requires an Azure AD Premium P1 license.
Cloud-only user password change (non-sspr) with password writeback can be done with the free version, but this doesn't include SSPR.
You should be good to go based on what you have.
Hope this helps!