We are declining this request due to low interest and demand. If it turns out to be popular in the future, we will reconsider the status. 

Regards,
Martin
Progress Telerik

Hello Holger,

Thank you for submitting this feature request. We will track the customer demand here, and will try to prioritize accordingly.

Meanwhile I hope the following solution will prove to yield the desired behavior:

Since the provided example is for a window component, I will explain how to remove scrollbars for the window component, but the approach is the same for dialogs.

Even though there is no scrollable option, scrollbars can be easily hidden. I have prepared a StackBlitz which demonstrates how to achieve this both by using service and by using kendo-window - https://stackblitz.com/edit/angular-v3w131

There are two main points:

1. The height of the window has to be fixed. When using kendo-window simply set [height]="{{ someValue }}". When using a service add height: someValue to the configuration of the open() method
2. Wrap the content of the window in a container which has to have at least these styles:

height: 100%; 
overflow: hidden

Please note that this method won't work when using service with strings(https://www.telerik.com/kendo-angular-ui/components/dialogs/window/service/#toc-using-strings).

Regards,
Petar
Progress Telerik