Particular Custom user attributes

Hi, I’ve a important application that use ucs ldap server for authentication.
Now I need to “expose” password expiration time in particular attribute and allow to change user password and new expiration time by application.

Then I’ve to read and write values in this schema:
Attribute: passwordExpirationTime
Attribute: passwordMustChange (false/true)
Attribute: accountUnlockTime (if account is disabled)

Can you help me about?
Thank you
Regards