https://communities.vmware.com/viewwebdoc.jspa?documentID=DOC-10141 has the list of distributable and modifiable code list for vSphere Guest SDK 5.5, 6.0, and 6.5 along with other SDKs. It does not mention anything about 6.7 although GuestSDK for 6.7 is available.
Where can I find the redistribution information for GuestSDK 6.7?
