Windows sets this attribute automatically, if you remove the drive letter from a partition. When you do this from a second Windows installation (dual boot), the attribute gets assigned, but the first Windows installation still keeps the drive letters.
My encryption policy is set to encrypt only specific partitions and I found, that partitions with this attribute set, will be automatically decrypted.
The GPT cannot be encrypted, so it is possible to set this attribute by attaching the disk to another pc. If you plug it back, the encrypted pc still works fine, but Drive Encryption starts silently decrypting the partition. This is not shown in the status window or ePO server.
I cannot think of this as intended behavior. What are your thoughts?
Re: Drive Encryption ignores partition with GPT attributes set
I think this is intended behavior due to compatibility issues because currently MDE 7.x does support GPT as a boot or secondary disk only for UEFI systems while for BIOS GPT can be used only for secondary disk:
Don't forget, when your helpful posts earn a kudos or get accepted as a solution you can unlock perks and badges. Those aren't the only badges, either. How many can you collect? Click here to learn more.
Community Help Hub
New to the forums or need help finding your way around the forums? There's a whole hub of community resources to help you.