eShare is a secure external sharing technology that is being used by agencies like the USPS OIG to securely share files with external agencies and local law enforcement. 

• Native integration with OneDrive and SharePoint for file storage, which means eShare provides no storage but instead leverages your existing cloud infrastructure.
•  Support for OpenID, allowing recipients to use their existing credentials to authenticate, simplifying the user experience.
• Org-defined and AD mapped sharing policies, which make it easy for users to apply the right controls and comply with direct data protection policies.
• Large file support with no limits on file sizes, allowing you to share any size files without worrying about compatibility issues.
• Fine-grained control over files, including dynamic watermarking and view-only access, while still allowing recipients to delegate access to colleagues.
• File sharing via email, with attachments stored in OneDrive and replaced with links, making it easier to track and control access to shared files.
• Use of a subdomain of OIG for all file links to avoid recipient link blocking, ensuring that your recipients can always access the shared files.