The CodeTwo Signatures Add‑in for Outlook is the official Outlook Web Add‑in, co‑developed with Microsoft, that enables automatic insertion of email signatures directly while composing messages in Outlook for Windows, Mac, Web (OWA), iOS & Android.
The add‑in is part of CodeTwo Email Signatures 365 and requires centralized deployment by a Microsoft 365 admin.
What’s Special About the Add‑in
(According to CodeTwo official documentation)
- Co‑engineered with Microsoft
Built using Microsoft’s newest Web Add‑in and event‑based activation technology to provide fast, secure, unified signature delivery across all Outlook platforms.
- Works Across All Outlook Apps
Supported on:
- Outlook for Windows (classic & new)
- Outlook for Mac
- Outlook on the Web (OWA)
- Outlook for iOS
- Outlook for Android
- Signatures Inserted Automatically While Typing
The add‑in inserts signatures as soon as the user starts composing, without any manual activation.
- Dynamic Signatures That React to Recipients
Signatures can automatically change based on:
- Internal vs external recipients
- Specific individuals or groups
- Which address is selected in the From field (including shared mailboxes or aliases)
- Cloud Signature Preview
If the organization uses cloud (server‑side) signature mode, the add‑in lets users preview the signature that will be stamped after sending.
- Centralized Management (No User Setup Required)
- Deployed via Microsoft 365 admin center
- Applies per user (not per device)
- No COM add‑ins or local installation required
- Supports Microsoft 365 Profiles Securely
Real‑time integration with Microsoft Entra ID (Azure AD) pulls accurate contact information for personalized signatures.
Deployment
The add‑in is deployed centrally by a global admin:
- Go to Microsoft 365 Admin Center → Integrated Apps
- Launch the “CodeTwo Signatures Add‑in for Outlook” deployment wizard
- Choose deployment scope:
- Just me
- Entire organization
- Specific users/groups
- Accept permissions
- Wait for propagation (usually 6–72 hours)
Important Notes from CodeTwo:
- Add‑in only works on supported Outlook versions
- Propagation delay is normal across Microsoft 365
- Firewall/Endpoint Manager customers must whitelist CodeTwo endpoints
How the Add‑in Works (User Experience)
- Automatic Signatures in Outlook
When composing a message, the add‑in:
- Inserts the appropriate signature (new/reply/internal/external)
- Updates dynamically as recipients change
- Requires no manual activation
- Manual Signature Switching (Desktop & OWA)
Users can open the add‑in pane to:
- Select a different signature
- Check the applied layout
- Outlook Mobile Behavior
On iOS & Android, the default signature is auto‑inserted, and signature choice is restricted based on Outlook mobile capabilities.
- Cloud Mode Preview
If server‑side cloud signatures are used, users can preview the final cloud‑processed signature before sending.
Advanced Add‑in Settings
The add‑in includes several admin‑controlled advanced settings:
- Disable local Outlook signatures to prevent duplication
- Show/hide notifications (desktop & mobile)
- Adjust signatures based on the ‘From’ field
- Allow switching between Outlook (client‑side) and cloud (server‑side) modes
Key Benefits
- Centralized signature management across the entire organization
- Professional, consistent branding on every email
- Marketing banners and campaign automation
- Legal disclaimers for compliance
- Analytics integrations: Google Analytics, Calendly, CrewHu & more
- 24/5 support with 24/7 backend monitoring
Business Impact
- Brand Consistency
All emails include consistent, compliant signatures across every device and app.
- Reduced IT Overhead
No local deployments, no scripts, no user configuration.
- Improved Marketing Agility
The marketing team can run campaigns, seasonal banners, surveys, and CTAs by updating the signature template instantly applied to all users.
- Compliance & Legal Assurance
Auto‑inserted disclaimers and uniform legal footers reduce risk.
- Cross‑platform reliability
Add‑in works across all modern Outlook clients thanks to Microsoft’s Web Add‑in framework.
Bottom Line
DBS ensures the add‑in is deployed, governed, and standardized using best‑practice Microsoft 365 controls covering deployment, signature‑rule management, mobile readiness, and operational reliability so organizations achieve a seamless, compliant signature experience across all Outlook clients.
