Thales has integrated its Luna HSMs with Microsoft Double Key Encryption for Microsoft 365. This allows customers to protect their most confidential or sensitive data while maintaining control of their encryption keys in the cloud. The solution works by using two keys to protect data. One key is managed securely by the customer via the Luna HSM and a second key in Microsoft’s control. To view the data, one must have access to both keys, meaning it can’t be used without the customer’s permission.
Source: https://www.helpnetsecurity.com/2021/03/17/thales-microsoft/