Course CXD-210 and CXD-235 have been consolidated into one flagship course, which is CXD-210. This course is on the current release of XenApp and XenDesktop which is version 7.12. The course number will remain the same moving forward and will be updated periodically to align with the current version releases. The next major refresh of this course will be for version 7.15 which is coming in the October time frame.
For customers running XenApp and XenDesktop 7.6 in their environment, you will benefit from course CXD-210 as it will cover everything in the previous version.