To improve screen sharing resolution, first ensure you have disconnected from your NDS Citrix VDI session.
1. After disconnecting, in the System tray, right click on Citrix Workspace and select Advanced Preferences (Figure 1):
Figure 1 Advanced Preferences
2. Click High DPI (Figure 2):
Figure 2 High DPI
3. Click No, use the native resolution and click Save (Figure 3):
Figure 3 Advanced Preferences
4. Begin a Citrix session with another user and perform a screen share test to confirm the resolution has improved
Further information can be found here.