Please understand that Citrix VDI hosted environment is different with original Windows environment or Windows VDI environment, you need to consult Citrix support for a help.
On Windows Side, what you have done is enough, del %appdata%\microsoft\windows\recent\automaticdestinations* command can always fix issue.
From my experience, I usually do the following:
Go to these two folders:
%AppData%\Microsoft\Windows\Recent\AutomaticDestinations
%AppData%\Microsoft\Windows\Recent\CustomDestinations
Then delete all the files in those folders. This should fix the issue without any further action.
In Windows Explorer, on the tool-ribbon, in the View tab, under options, select "Change Folder and Search Options," In the Folder Options dialog, in the Privacy section at the bottom:
uncheck "Show recently used files in Quick access"
uncheck "Show frequently used folders in Quick access"
Once I did this, I was able to drag a folder to Quick Access which had only give me the red "forbidden" circle before.
Source:
https://superuser.com/questions/969012/unable-to-add-files-folders-to-quick-access-on-windows-10-unspecified-error/969013
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