Microsoft Exchange email signature management
Centralize your organization’s email signatures
Enforce consistent, on-brand signatures automatically. Get professionally branded and compliant email signatures in any Microsoft environment from on-premises Exchange, hybrid Exchange, and Exchange Online.
Simplify management with centralized control. Centrally manage Exchange email signatures online rather than on a server. Create professional templates in minutes using our advanced signature designer.
Ensure total accuracy. All contact information is taken from your Azure AD (Active Directory) to autopopulate a signature. Users can also choose from a set of approved signature templates within Outlook itself.
Support your cloud journey. Seamlessly migrate your email signatures when you move to Microsoft 365 (Office 365) with no service interruption.
Streamline your workflow with rule-based automation
Create precise signature rules. Define signature policies based on department, location, role, or user attributes from Active Directory, ensuring consistent and accurate application across your organization.
Ensure seamless deployment across devices. Automatically apply standardized email signatures to all messages sent via Microsoft Exchange, regardless of device or mail client.
Schedule signature updates. Automate changes for events, seasonal campaigns, compliance updates, or announcements to keep communications relevant and up-to-date.
Active Directory integration. Pull real-time data from Active Directory to dynamically populate job titles, phone numbers, and other key details, eliminating outdated or incorrect information in signatures.
Ensure compliance across your Exchange environment
Automate legal disclaimers. Automatically apply HIPAA, GDPR, and industry-specific disclaimers to every email — without relying on users to add or modify them.
Protect signature integrity. Lock email signatures at the Exchange server level, ensuring branding, disclaimers, and compliance messaging cannot be altered or removed.
Maintain audit-ready compliance records. Track and log signature usage, modifications, and application history, supporting compliance audits, legal discovery, and internal security reviews.
Designed for regulated industries. Exclaimer for Microsoft Exchange Online helps organizations in regulated industries maintain consistent, compliant email communication without IT overhead.
Trusted by 9 million email accounts worldwide
Flexible deployment options to fit your Microsoft 365 environment
See signatures without passing messages to Microsoft Azure
Exclaimer integrates directly with Outlook for Microsoft Exchange Online, applying email signatures instantly as users compose messages — without rerouting emails through external services.
Signatures appear in real time as emails are composed in Outlook.
No external mail flow. Emails are not processed by Exclaimer.
An Outlook Add-In is installed on each user’s machine, adding email signatures in Outlook or Apple Mail.
Achieve the ideal balance between flexibility and control
With our hybrid solution, email signatures are deployed to compatible email clients, with emails also routed through Azure. This means every email includes the correct signature while maintaining a smooth user experience. Automatic deduplication between deployments allows both to be used without conflict.
Instant signature visibility while drafting emails in Outlook.
Server-side enforcement ensures standardized, compliant signatures.
Seamless compatibility across all devices and email clients, including mobile and third-party applications.
Enterprise-level security, compliance, and reliability
Reliable performance at scale
Exclaimer's Active-active infrastructure, hosted in 14 Microsoft Azure datacenters across 7 regions worldwide, is designed for uninterrupted service. With features like automatic failover, load balancing, and regional redundancy, it provides comprehensive email signature management for Exchange users and an uninterrupted service.
Advanced security built in
All email and data transfers are encrypted using TLS, with firewalls, DDoS protection, and intrusion prevention systems (IPS) guarding against cyber threats. Exclaimer employs a DevSecOps approach, integrating security into every stage of development and deployment to protect your email signatures in Exchange.
Trusted compliance standards
Exclaimer meets leading compliance standards, including SOC 2 Type II, ISO/IEC 27001, HIPAA, GDPR, CCPA, and Cyber Essentials. Regular independent audits reinforce Exclaimer as the most secure Exchange email signature manager.
Industry-leading email signature management for Exchange
More than 70,000 companies use Exclaimer for automated Exchange email signatures, including:
Calming the email signature storm for Burris Logistics
Burris Logistics chooses Exclaimer to standardize all employee signatures and present the company professionally on all corporate emails.
Read more
Marketing and IT join forces to power up engagement for Experlogix
The IT and marketing teams at Experlogix chose Exclaimer together, to ensure efficient management and brand consistency.
Read more
Shearwater Geoservices increase ROI & achieve brand harmony with Exclaimer
Discover how Shearwater Geoservices boosted their ROI and achieved brand consistency with Exclaimer.
Read moreCalming the email signature storm for Burris Logistics
Burris Logistics chooses Exclaimer to standardize all employee signatures and present the company professionally on all corporate emails.
Read moreMarketing and IT join forces to power up engagement for Experlogix
The IT and marketing teams at Experlogix chose Exclaimer together, to ensure efficient management and brand consistency.
Read moreShearwater Geoservices increase ROI & achieve brand harmony with Exclaimer
Discover how Shearwater Geoservices boosted their ROI and achieved brand consistency with Exclaimer.
Read moreHow much could you save?
Total annual cost of email signature changes to your business
$ 0
Annual cost of Exclaimer (volume discounts available)
$ 0
ROI
0 %
Try our Exchange email signature software
Keep every Exchange email consistent and professional with centralized signature management.
Frequently asked questions
Exclaimer integrates seamlessly with Microsoft Exchange Online, using Azure Active Directory to sync user details in real time. It applies consistent, branded signatures across all devices and email clients, ensuring uniform branding and compliance. Organizations can choose from server-side, client-side, or hybrid deployment options for maximum flexibility.
Yes, data security is a top priority. Emails processed through Exclaimer’s Azure infrastructure are protected with TLS encryption, advanced firewalls, intrusion prevention systems (IPS), and proactive DDoS protection. Exclaimer follows strict DevSecOps practices, embedding security throughout development.
Yes, Exclaimer can retrieve user details from Active Directory (AD) to personalize email signatures. By integrating with AD, Exclaimer ensures that signatures automatically include accurate and up-to-date information such as names, job titles, and contact details, reducing manual updates and maintaining consistency across all user signatures.
Exclaimer ensures security and compliance by processing emails through Microsoft Azure datacenters, keeping data within regional boundaries. It complies with ISO/IEC 27001 and ISO/IEC 27018 standards for information security. Exclaimer does not store or read email content, only adding the signature to maintain privacy and integrity.
Yes, Exclaimer supports hybrid Exchange environments by managing email signatures across on-premises and Exchange Online mailboxes. For client-side signatures, Exclaimer provides an Outlook Add-In for Exchange Online users and a Signature Update Agent for on-premises users. For server-side signatures, Exclaimer applies signatures automatically by configuring the Exchange Transport Agent for on-premises emails and integrating with Microsoft 365 connectors for cloud-based mail. This setup ensures consistent email signatures across all platforms in hybrid Exchange environments.
Exclaimer operates on an Active-Active infrastructure hosted in 14 Microsoft Azure datacenters across 7 regions. Features like automatic failover, load balancing, and regional redundancy provide high reliability and uninterrupted email signature application.
Yes, Exclaimer is designed for enterprise deployments, managing email signatures at scale. Its secure, scalable infrastructure ensures compliance, reliability, and streamlined management for large, complex environments.
Exclaimer is tailored for regulated industries, offering:
Centralized control over signature content
Managed compliance disclaimers
Secure template enforcement
It supports regulations like HIPAA, GDPR, and other industry standards, ensuring ongoing compliance without user intervention.
Exclaimer supports on-premises Microsoft Exchange through the Exchange Transport Agent, which integrates with Mailbox role servers to apply signatures based on predefined rules and Active Directory attributes.
Synchronization with Azure Active Directory (Azure AD) via Azure AD Connect ensures accurate user data. Administrators configure Exclaimer through the Exclaimer portal, authorizing Azure AD access and enabling Exchange on-premises support. The transport agent installation requires a Service URI and API key, enabling automated signature management.
Exclaimer has discontinued legacy products like Signature Manager Exchange Edition, with support ending September 30, 2024. Organizations using these solutions should migrate to Exclaimer’s cloud services or the updated Exchange Transport Agent to maintain compliance, branding, and security.