Note: For the Exclaimer add-in for Outlook, please go to AppSource.

Why Exclaimer

Managing email signatures at scale is time-consuming, error-prone, and often inconsistent across users and devices. Exclaimer solves this by centralizing and automating the management of email signatures for Microsoft 365, with zero end-user effort.

IT teams get full control so brand and compliance standards are met on every email, while enabling marketing teams can run targeted campaigns. And all without manual updates or scripting.

More than 70,000 organizations worldwide trust Exclaimer for secure and scalable email signature control built for simplicity and control.

Activate your Exclaimer Free Trial.

Core benefits & features

Centralized email signature management: Design and deploy email signatures to all users from a single, intuitive web portal.

Easy signature design: Create email signatures using a simple editor that requires no coding skills.

Consistent across all devices: Apply the same signatures whether emails are sent from desktop, mobile, or tablet.

Automatic user data sync: Auto-populate signatures with user details taken from Microsoft Entra ID (Azure Active Directory).

Targeted signature campaigns: Run marketing banners based on recipient, sender, or region. Control exactly which signatures are shown and to whom.

Compliance & brand control: Ensure legal disclaimers, certifications, and brand elements are present and accurate every time.

Granular access controls: Assign role-based permissions so IT can maintain control while enabling teams like marketing or legal to manage content safely.

Secure and compliant

Exclaimer is designed with security at every level:

SOC 2 Type II certified

ISO 27001 and ISO 27018 certified

GDPR and HIPAA compliant

100 out of 100 SecurityScorecard rating

TLS encryption, IPS, firewalls, and DDoS protection

Built with a DevSecOps approach from the ground up

Reliability you can trust

Hosted across 14 load-balanced Microsoft Azure datacenters in 7 global regions.

Built-in regional failover for resilience and continuity of service.

24/7 monitoring with real-time service alerts.

99.99% uptime guaranteed.

24/5 technical support.

How it works

Secure Microsoft 365 integration: Exclaimer connects directly to Microsoft 365 using secure Exchange Online connectors. Everything runs in Microsoft Azure for security, scale, and reliability.

Automatic signature application in the cloud: Emails are routed through Exclaimer, where signatures are added automatically before the message is delivered. No user action is required, and signatures stay consistent across all devices.

Centralized control: Manage email signature designs, user assignments, and permissions from a single web-based dashboard. Integrated with Microsoft Entra ID (Azure AD), so user data sync automatically.

Outlook Add-In for previews (optional): Give users the ability to see their signature in Outlook as they compose, without changing how the signature is applied.

Always up to date: Automatically syncs with Microsoft Entra ID (Azure AD) to keep user details current without manual updates.

Trusted by global brands

Organizations like BBC, Xerox, Cisco, Unilever, and Sony rely on Exclaimer to deliver consistent and compliant email signatures at scale.

Exclaimer: Centralized email signature managementEXCLAIMER LTD4.7(1140 ratings)

Exclaimer: Centralized email signature management

EXCLAIMER LTD

Exclaimer: Centralized email signature management

EXCLAIMER LTD

Exclaimer: Centralized email signature management
EXCLAIMER LTD
4.7(1140 ratings)