First of all, thanks for the quick answer. Sadly I have already read the links you put there. I guess the misunderstanding is because this is not my native language. I would try to express myself better.
The issue is that we cannot find a configuration for the automatic resize resolution on the SSL VPN web (that uses RDP). As you can see in the documentation there is a way to manually configure the screen width and height:
Screen width .
Minimum value: 640 Maximum value: 65535
Screen height .
Minimum value: 480 Maximum value: 65535
Before 7.0.4 this was done automatically, now all our RDP conections apparently need fixed values. Because of covid, a big part of our users are working on their home computers, they all have different size monitors and, as you can assume, it is not an option to manually set all users. We update it because the documentation explicity said that this was only done when creating a new connection or bookmark:
Allow customization of RDP display size (width and height settings) for SSL VPN web mode when creating a new connection or bookmark. Administrators can also specify the display size when pre-configuring bookmarks.
But this is sadly not true :(, the already configured users have been all changed to this new fixed values automatically. I hope we're just misreading something!