Key Aspects
Cloud-Hosted
Fully managed by Microsoft with no on-premises servers required. Provides 50-100 GB mailboxes per user.
Built-in Security
Includes anti-malware, anti-spam, data loss prevention, and encryption capabilities.
Transport Rules
Mail flow rules can modify, redirect, or add disclaimers to messages based on configurable conditions.
Active Directory Integration
Syncs with Azure AD for centralized user management, making it ideal for enterprises.
Exchange Online and Email Signatures
Exchange Online provides built-in mail flow rules (transport rules) that can append disclaimers and basic signature text to outgoing emails. However, these native rules are limited in formatting options and do not support rich HTML designs, images, or per-user dynamic content effectively.
Organizations that need visually branded, dynamic email signatures for Exchange Online typically use third-party signature management platforms. Siggly integrates with Exchange Online and Microsoft 365 to deploy professional, HTML-formatted signatures with dynamic fields (name, title, phone) pulled from Azure Active Directory, providing far richer signatures than native transport rules allow.