Windows Search does not index the encrypted drives anymore.
The Boxcryptor drives do not appear in the Windows disk manager - in consequence they cannot be manually configured to be indexed.
Same effect when mounting the drives for all users and/or as fixed drive.
Same effect with bc classic version 1.6 and 1.7 (latest release)
Maybe that feature is broken by Windows update 1?
Non-classic Boxcryptor has a configuration property to show BC drives in disk manager, classic version does not.
Windows 8.1 Update 1 64-bit
Boxcryptor Classic 1.7 & 1.6