CryptUnprotectData (dpapi.h) fails when used with VDI setup

Question

We are using CryptProtectData to protect our file using CRYPTPROTECT_LOCAL_MACHINE as the dwFlags parameter. This flag associates the data encrypted with the current computer instead of with an individual user.
We are decrypting the file using CryptUnprotectData which uses the same flag as above to unprotect the file.

This works fine on a physical windows machine.

When we try the same on a VMWare related VDI setup, it works fine as long as the user does not log out. The moment user logs out and logs in again, the CryptUnprotectData fails.
We are using VDI with Non persistent Instant Clone setup.

Any help on this would be highly appreciated.

Answer 1

This works fine on a physical windows machine.

It seems to me that you should be pursuing your question with VMware support.