Open Citrix Files on your computer by clicking on the File Explorer icon on your taskbar
In the Folder list of the File Explorer, scroll down until you see This PC
Click the arrow next to This PC to expand it and then select Citrix Files (T:)
Double Click on Personal Folders
Create a new folder where you can store the files that will be uploaded by the outside party.
Right click on the folder that you just created and select Request and then Copy Link (this will put a link into your clipboard that you can paste into an email that you can send to the outside party who needs to send you files)
Open up a New Email message from Outlook and Paste the link from Step 7 into the body of the message along with anything else you would like to send to the individual you are requesting files from.