Using Pam native RDP does not allow use it but have a techdoc available that was offered our company to change the default resolution of RDP applet to 3000x1200 to span the resulting session across all screens we have. However we didin´t like this solution and really does not work as Windows Remote Desktop when “use all my monitors for remote session” is enabled. This is the link of techdoc:
Please, we want to make PAM RDP connection have multiple monitor working out of the box (in native pam rdp).
We have a very high business impact to decide use PAM to our Network Operation Center where they use multiple monitors and actually PAM opens only in one.