Do my emails remain private when using Signature 365?
Learn how Signature 365 injects signatures without storing or reading your email content.
Yes, your emails remain entirely private. We do not store or read your emails. The Signature 365 service scans each email for any reply/forward separator, injects the relevant signature in the correct place, and immediately routes the email back to your Microsoft 365 tenant for delivery.
For more information, see Signature 365 reliability and security.
Service information
Browse service information covering security, privacy, networking, permissions, and platform support for Signature 365.
Do you store my Microsoft 365 Global Administrator credentials?
See how Signature 365 uses OAuth access tokens instead of storing Microsoft 365 global administrator credentials.