So this is not about getting DO to run within a Citrix session.
I am noticing when I have remote Citrix connection open on my Windows 10 system through Citrix Workspace App, Directory Opus is slow to open, and sometime extremely slow. Like it can take 30 seconds for a window to appear. As soon as I disconnect the Citrix session, DO responds normally again.
I guess DO tries to index files from the Citrix environment somehow (which it can't do anyhow). What can I do to fix this? In the Citrix settings I have already set File Access Settings to No Access. But that doesn't help much.