Microsoft 365 email signatures made simple
Centralized email signature management
Ensure consistency across emails. Guaranteed consistency on all emails. Get professional email signatures on all devices and mail clients, including mobiles and Macs.
Eliminate manual updates with centralized control. Manage Microsoft 365 signatures from a single dashboard. Whether it's for a company rebrand, disclaimer update, or new marketing campaigns, you can deploy new signature templates in minutes.
Guarantee 100% accuracy. Make sure contact information is always up to date, with easy and automatic syncing from your Azure Active Directory (AAD).
Enable role-based access control (RBAC). Delegate email signature management to specific users or teams such as Marketing or HR. All while IT retains full control.
Save time with rule-based automation
Deploy multiple signature templates. Create rules to apply signatures across roles, departments and locations company-wide or individually. Set different signatures for internal and external emails, as well as replies and forwarded messages
Apply signatures across all devices. Easily create a Microsoft 365 email signature by dragging elements into the template. Preview the signature with users’ contact information. Update templates quickly and deploy changes instantly.
Set precise signature rules. Use any attribute from your local AD synchronized via AAD Connect, including custom attributes that you've created in your local AD schema.
Schedule updates in advance. Automate seasonal campaigns, legal disclaimers, or event-specific changes.
Ensure compliance with every email
Automate legal disclaimers. Ensure compliance including GDPR and industry-specific regulations like HIPAA using centrally managed, auto-applied legal disclaimers. Every outbound email is automatically aligned with regulatory requirements for seamless, reliable adherence.
Enforce tamper-proof security. Apply server-level signatures directly in Microsoft 365, preventing unauthorized edits, accidental deletions, or non-compliant modifications by end users.
Maintain audit-ready compliance records. Track and log email signature usage for audit trails, legal discovery, and internal policy enforcement, ensuring full transparency and accountability.
Built for highly regulated industries. Exclaimer is designed for organizations with strict regulatory requirements, providing robust protection against compliance violations and reputational risks.
Trusted by 9 million email accounts worldwide
Flexible deployment options to fit your Microsoft 365 environment
See signatures before you send
With Exclaimer's client-side configuration, users can see their email signatures while composing messages in Outlook (Windows, Web, MacOS).
Signatures are synchronized directly to users' devices, ensuring real-time visibility and selection during email composition.
Deploys signatures using the Outlook Add-in or Desktop Agent for seamless integration.
Ensures personalized signatures with dynamic fields from Azure Active Directory.
Automatically applies different signatures based on recipient type (internal/external).
Synchronizes signatures directly with Outlook, allowing users to preview them before sending.
Achieve the ideal balance between flexibility and control
Our hybrid deployment that combines real-time signature visibility with server-side enforcement for consistency across all devices.
This setup ensures users see their email signature while composing in Outlook, while server-side processing guarantees compliance and uniform branding—no matter where or how an email is sent.
Deploy Microsoft 365 email signatures in Outlook and pass them for imprinting after a message is sent.
Ensure every email includes a signature, visible to users as they compose their messages.
No risk of outdated or missing signatures, as everything syncs through Azure AD.
Ideal for organizations seeking full visibility of email signatures.
Enterprise-grade reliability, security, and compliance
Uninterrupted performance, built for scale
Exclaimer’s Active-Active architecture, hosted in 14 Microsoft Azure data centers across 7 global regions, ensures continuous uptime. Features like automatic failover, load balancing, and regional redundancy guarantee consistent email signature application and continuity of service.
Robust security measures
Every email and data transfer is fully encrypted with TLS protection, while advanced firewalls, active DDoS mitigation, and intrusion prevention systems (IPS) safeguard against cyber threats. With a DevSecOps approach, security is integrated into every stage of development and deployment.
Compliance you can trust
Exclaimer complies with top industry standards, including SOC 2 Type II, ISO/IEC 27001, HIPAA, GDPR, CCPA, and Cyber Essentials. Regular and extensive independent audits make Exclaimer the most secure Microsoft 365 (Office 365) signature management solution available.
Market-leading email signature software for Microsoft 365
Over 75,000 companies automate email signature updates with Exclaimer, including:
How CIS Security influenced £6.1 million in revenue with Exclaimer
Centralizing email signature management to enhance branding, security, and marketing impact.
Read more
How Denholm Good Logistics saved 40+ hours monthly with Exclaimer
Enhancing IT efficiency, brand consistency, and marketing opportunities across a growing global enterprise.
Read more
How Bloomerang achieved 100% brand consistency in 15 minutes with Exclaimer
Unifying email signature management for enhanced IT efficiency and marketing impact.
Read moreHow CIS Security influenced £6.1 million in revenue with Exclaimer
Centralizing email signature management to enhance branding, security, and marketing impact.
Read moreHow Denholm Good Logistics saved 40+ hours monthly with Exclaimer
Enhancing IT efficiency, brand consistency, and marketing opportunities across a growing global enterprise.
Read moreHow Bloomerang achieved 100% brand consistency in 15 minutes with Exclaimer
Unifying email signature management for enhanced IT efficiency and marketing impact.
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 email signature solution for Microsoft 365
Easily standardize, manage, and update signatures across your entire organization.
Frequently asked questions
Yes, Exclaimer prioritizes data security at every stage. Data is encrypted end-to-end with TLS protection, and advanced security measures such as firewalls, intrusion prevention systems (IPS), and active DDoS protection are in place to defend against cyber threats.
Additionally, Exclaimer’s DevSecOps approach ensures that security is embedded into every product from development to deployment.
Absolutely. Exclaimer meets the highest industry standards, including SOC 2 Type II, ISO 27001, ISO 27018, HIPAA, and Cyber Essentials.
Regular independent audits are conducted to ensure your organization’s data remains protected and fully compliant with relevant regulations.
Exclaimer ensures high availability with a 99.99% uptime by using Microsoft Azure’s global infrastructure. The Exclaimer platform operates across 14 regional Azure datacenters, each with primary and secondary locations for redundancy.
High Availability Clusters (HAC) and automated load balancing distribute traffic efficiently, preventing downtime. Continuous data synchronization offers seamless failover in case of an outage, while scheduled updates are deployed during off-peak hours to minimize disruption.
These measures, combined with real-time monitoring and rigorous stress testing, guarantee a reliable and uninterrupted service.
Yes, Exclaimer is built for organizations of all sizes, including enterprises with complex IT environments. Its scalable architecture supports thousands of users with centralized management and granular control.
The platform ensures reliability with a high-availability infrastructure and adheres to industry standards to provide security for regulated industries.
Exclaimer integrates with Microsoft 365 by accessing user information from Azure Active Directory (Azure AD) through administrator-granted permissions. Once authorized, Exclaimer synchronizes user data, such as names, job titles, and contact details, to dynamically populate email signatures.
It requires permissions like User.Read, Directory.Read.All, and User.Read.All, enabling it to retrieve user profiles, directory information, and photos. The data is securely stored within Exclaimer’s infrastructure.
The Exclaimer Outlook Add-in integrates with Microsoft Outlook 365, allowing users to manage and apply email signatures within their Outlook email client. This add-in lets a user choose from a selection of signature templates when writing an email composition. It supports various platforms, including Outlook on Windows, macOS, web (OWA), and mobile devices (iOS and Android), providing a seamless experience across devices.
Administrators can centrally deploy and manage the add-in across the organization, reducing IT overhead and ensuring uniformity in email signatures.