I have the same question, how to disable inform?  If I set to off it ask for a ACS url and of course can´t save the setting.

Why is there no explanation about this setting in the router manual?

Thank you very much for you reply. The question is why I cannot dissable INFORM since CWMP is dissabled.

As user I must have the possibility to make the settings I want, whether it works or not, it is my problem and my decision.

There is no reference to this setting in the user manual and TPLink Technical Support does not answer to my question, that's why I go to this forum.

Why there is no reference about this setting?

The Archer C80 replaced an Archer C60 that did not have CWMP settings and it works fine, so I understand that is not strictly necessar, at least in my case.

But there is still no way to disable INFORM within CWMP settings without having to put an ACR URL. Why????

My apologies for my basic english.

@doooo 

Response received from TPlink support translated by google into English.

We write you in reference to your order under the Ticket: xxxxxx

Hello, look a lot and I do not get the reference to this router of this version having the CWMP option. Was this bought new, or did it come from an internet provider? Likewise, the report has not programmed to send information to any ACS (Agile Config Server). There should be a designated URL for it to receive the Informs from the router. Without the CWMP, no one can control your router remotely. Curious answer because whoever answered me from support does not know or knows about the CWMP settings.

The router was bought new in a specialized store of course.

I still don't know why I can't disable INFORM

A few days ago support sent me a new firmware. Luckily I had the precaution to verify it before and it was for a router model very different from mine. Of course they apologized to me, but the official support level from TP-Link is very poor  or it just doesn't exist.