Hi Avinash,
To be able to encrypt the drive via Encrypt button you need to make sure that the policy is as follow:
- SEMS > Consumers > Consumer Policy > Default > Desktop button > Drive Encryption tab
- Operation Internal disks / removable disks (if you want as well) are having ticked Allow Encryption.
For your additional information - Select how you want internal and removable disks to be managed.
Allow User Management. Selecting this option means a user can add or remove other passphrase users from the user's device.
Allow Encryption. Selecting this option means users can initiate encryption of internal and/or removable disks. Automatic disk encryption during setup is not affected by this policy.
Allow Decryption. Selecting this option means users can initiate decryption of internal and/or removable disks. If you do not enable this option, users cannot decrypt disks. Decryption after license expiration is not affected by this policy.
- "Allow" encryption of disks to existing Windows Single Sign On password
- DO NOT tick "Automatically encrypt Boot disk at installation"
This will allow end user to initiate the encryption process manually via Encrypt button.
HTH