modify user password fails

[Formartha]

hello,
I created the following function but it fails, i tried using ChatGPT without luck, hence reaching out for help here.

 def modify_user_password(self, username, password):

    dn = self.generate_user_dn(username)
    self.connection.extend.microsoft.modify_password(dn, old_password=None, new_password=password)
    if self.connection.result['description'] != 'success':
        logger.error(f"Failed to set password: {self.connection.result}")
        return False`

that's the error I'm getting:
ERROR:__main__:Failed to set password: {'result': 53, 'description': 'unwillingToPerform', 'dn': '', 'message': '0000001F: SvcErr: DSID-031A126C, problem 5003 (WILL_NOT_PERFORM), data 0\n\x00', 'referrals': None, 'type': 'modifyResponse'}