On the Security section of the Advanced features, you can block, disable or customize connection types for users.
Select the "Yes" value if you wish to deny access to standard RDP clients such as mstsc to your users.
This listing is required for Load-Balancing Sticky Sessions feature and is enabled by default. If you wish to disable it, select the "No" value on this window, then click on save:
Disable the Web Portal for Administrators by selecting the "Yes" value:
Deny access from standard RDP clients connected from outside the LAN by selecting the "Yes" value.
Make Web Portal access mandatory for every user by selecting the "yes" value.
Make Web Portal access mandatory for every user, except the Admins by selecting the "yes" value.
Allow access only for users with, at least, one assigned application by selecting the "yes" value.
Allow access for admins even if they do not have any assigned application and "Only Users with Applications" is enabled. This feature is enabled by default. If you wish to disable it, select the "No" value on this window, then click on save: