have you tried using the link that can be generated by the drive mapper? I think that may work because I just use that and was alarmed that the link did not follow any security applied. Keep in mind the party will always have to download that which creates another question do you want them to upload or just download?
Whenever you create the link make sure that the settings for 'never expire' are checked and that 'always link to the latest version' is checked. More information can be found here: https://support.citrix.com/article/CTX208291