No link , ele diz:
In order to be able to index a VeraCrypt volume through Windows Search, the volume must be mounted at boot time (System Favorite) or the Windows Search services must be restart after the volume is mounted. This is needed because Windows Search can only index drives that are available when it starts.
Tente reiniciar o serviço: Executar: services.msc > "Pesquisa do Windows" > Reinicie
Ou na linha de comando, com privilégios de administrador:
net stop wsearch
net start wsearch
Espero que isso ajude.