0x88010001: One or more fixed volumes are not provisioned with the 3rd party encryption providers to support device encryption. Enable encryption with the 3rd party provider to comply with policy.
0x88010002: This computer is not fully encrypted. There are fixed volumes present which are not supported for encryption.
0x88010003: This computer does not meet the hardware requirements to support device encryption with the installed 3rd party provider.
0x88010004: This computer cannot support device encryption because the requisites for the device lock feature are not configured.
0x88010005: Protection is enabled on this volume but is not in the active state.
0x88010006: The 3rd party provider has been installed, but cannot activate encryption beacuse a license has not been activated.
0x88010007: The operating system drive is not protected by 3rd party drive encryption.
0x88010008: Unexpected failure was encountered while calling into the 3rd Party drive encryption plugin.
0x88010009: The input buffer size for the lockout metadata used by the 3rd party drive encryption is too large.
- winerror.h from Windows SDK 10.0.14393.0