Get-MsolUser -userprincipalname user@domain.org | select DisplayName, LastPasswordChangeTimeStamp,@{Name=”PasswordAge”;Expression={(Get-Date)-$_.LastPasswordChangeTimeStamp}}

DisplayName    LastPasswordChangeTimestamp PasswordAge
-----------    --------------------------- -----------
User, Name     09-Mar-16 5:48p             42.22:34:10.6964630

Get-MsolUser -All | select DisplayName, LastPasswordChangeTimeStamp,@{Name=”PasswordAge”;Expression={(Get-Date)-$_.LastPasswordChangeTimeStamp}} | where {$_.PasswordAge -gt “30”} | sort-object PasswordAge -descending