I did the settings here : https://www.dynu.com/DynamicDNS/IPUpdateClient/HUAWEI-HG533
an error message in the server address.This error "server address is invalid."

This model of HUAWEI router only supports numeric values(IP address) for 'Server address'. We have reported this issue to our developers who will work on supporting updates through server IP addresses. Until then you can download and use our client software at http://www.dynu.com/DynamicDNS/IPUpdateClient

The IP address of the service 173.208.131.204 but this does not work. Do not have another way to use my off mode?
Thanks for the reply.

Our developers are working on supporting updates through server IP addresses. Until then you can download and use our client software at http://www.dynu.com/DynamicDNS/IPUpdateClient.

We apologize for the inconvenience. Thank you for your patience.

I Have the same error please find solution for this problem thanks

Same problem over here...