If i get a encrypted mail that is declared as junk, GpgOL fails / or not trying to encrypt it. Which is reasonable. Actually Outlook doesn't move that mail back to inbox without an error when i declare it as ok.
Select a junkmail -> rightclick -> "Junk-E-Mail" -> "No Junk-E-Mail" should move that mail back to inbox.
Allow HTML for this Junk E-Mail. After that it's possible to move the mail out of the junk folder.
Windows 10 1709 64bit
Outlook 2010 32bit