Dell Wyse losing RDP config

Hey,

We are currently installing new Dell Wyse thin clients. We want to login with the Dell Wyse clients via RDP to a terminal server, unfortunately we have the following problem: The configuration for RDP is not completely pulled from the WMS, the box "Fullscreen" therefore always remains empty. Also, once you connect to the RDP session, it loses its settings, so reconnecting is not possible. Does anyone have any idea what this could be?

thanks in advance