The following table identifies the supported tasks that can be performed in Microsoft 365 eDiscovery tools on encrypted files attached to email messages and encrypted documents in SharePoint and OneDrive. eDiscovery activities that support encrypted items Therefore, you won't be able to use eDiscovery tools to search for OME-encrypted messages because those messages are never received by the recipient's mailbox. When using an OME custom branding template, email messages are delivered to the OME portal instead of the recipient's mailbox. The decryption of email messages sent with an Office 365 Message Encryption (OME) custom branding template is not supported by Microsoft eDiscovery tools. For example, previewing or exporting content encrypted with non-Microsoft technologies isn't supported. Content encrypted by third-party encryption technologies isn't supported. For more information about Microsoft encryption technologies, see Encryption. These technologies are Azure Rights Management and Microsoft Information Protection (specifically sensitivity labels). Microsoft eDiscovery tools support items encrypted with Microsoft encryption technologies. This decryption capability allows eDiscovery managers to view the content of encrypted email attachments and site documents when previewing search results, and review them after they have been added to a review set in Advanced eDiscovery. Additionally, encrypted documents in SharePoint and OneDrive that are attached to an email message are searchable. Now, files that are encrypted with a Microsoft encryption technology is located on a SharePoint or OneDrive account are searchable and decrypted when the search results are prepared for preview, added to a review set in Advanced eDiscovery, and exported. Encrypted documents in SharePoint and OneDrive couldn't be decrypted during the eDiscovery workflow. Prior to this new capability, only the content of an email message protected by rights management (and not attached files) were decrypted. 1 Additionally, encrypted documents stored in SharePoint Online and OneDrive for Business are decrypted in Advanced eDiscovery. To make it easier to manage encrypted content in the eDiscovery workflow, Microsoft 365 eDiscovery tools now incorporate the decryption of encrypted files attached to email messages and sent in Exchange Online. Content encrypted with Microsoft encryption technologies wasn't available for review until after it was exported. To execute common eDiscovery tasks on encrypted content, eDiscovery managers were required to decrypt email message content as it was exported from content searches, Core eDiscovery cases, and Advanced eDiscovery cases.

Organizations of all types use encryption technology to protect sensitive content within their organization and ensure that only the right people have access to that content.

Encryption is an important part of your file protection and information protection strategy.

.kfe advanced folder encryption