
A well-crafted email signature enhances professionalism, credibility, and brand consistency in every email you send. Whether you’re an individual professional or a business, setting up an Outlook 365 signature ensures your emails maintain a polished and standardized appearance.
An email signature is a block of text, images, and links automatically appended to outgoing emails. It typically includes:
- Full name and job title
- Company name and logo
- Contact details
- Website and social media links
- Legal disclaimers (if required)
Why Are Email Signatures Important?
A professional email signature provides several benefits:
- Professionalism – Establishes a consistent and professional brand identity.
- Brand Awareness – Reinforces your brand with every email.
- Legal Compliance – Includes necessary disclaimers for regulatory requirements.
- Convenience – Auto-inserts essential details, saving time.
- Marketing – Promotes your business with social links and website URLs.
How to Create an Email Signature in Outlook 365
Creating a Signature in the Outlook Desktop App
- Open Outlook and go to File > Options > Mail.
- Click Signatures… under the Compose messages section.

- Click New, enter a signature name, and design your signature.

- Format text, add images, and insert links.
- If using templates, click Get signature templates.
- Select an email signature from the Templates Gallery, download it as a Word file.
- Customize the signature and copy the entire signature into the Edit Signature body.
- Set it as default for new emails and replies.
- Click OK to save.
Setting Up a Signature in Outlook Web (OWA)
- Log in to Outlook Web.
- Click the gear icon and select View all Outlook settings.

- Navigate to Mail > Compose and reply.
- Under Email signature, enter your signature details.

- Check the box to automatically include it in new emails and replies.
- Click Save.
Configuring a Signature in the New Outlook (Similar to OWA)
- Open New Outlook.
- Click Settings > Mail > Compose and reply.
- Enter the signature text, format it, and add images.
- Enable it for new emails and replies.
- Click Save.
How to Set Up an Organization-Wide Email Signature
For a uniform organization-wide signature, use the Exchange Admin Center (EAC).
Using Exchange Admin Center (EAC)
- Log in to Microsoft 365 Admin Center.
- Open Exchange Admin Center (EAC).
- Navigate to Mail flow > Rules.
- Click + Add a rule, then name it “Email Signature (Org-wide)”.

- Under Apply this rule, select The sender is External/Internal.

- Under The Sender is located, choose InOrganization.
Configuring the Signature with HTML Formatting
Configure the signature with HTML formatting. I am using a mail signature website to generate the HTML-formatted signature. You can also choose the best one from there, or you can request your developer to create a signature in HTML.
- Use an email signature generator or an HTML template.
- Open the template section and select a suitable design.

- Edit the signature with:

- Company detailsCompany logo and graphics
- Colors and social media links

- Click Microsoft 365, then Replace user data with Active Directory placeholders.

- Click Generate HTML.

- Copy the HTML code.
- Go to Exchange Admin Center in the tab where you are creating the Transport rule, under Do the following, in the rule select Enter text.

- Click Enter text, paste the HTML code, and save it.

- Under Fall back action, select Wrap, then save.

- Click Next, then Enforce the rule.
- Review the rule and click Finish.
- Open the created rule and enable it.

Testing the Organization-Wide Email Signature
- Open Outlook and send a test email.
- Ensure all user details are completed in Microsoft 365 Admin>Contact information.

- Customize the logo if needed.

Best Practices for Designing Email Signatures
- Keep It Simple – Avoid cluttered designs.
- Use HTML Formatting – Ensures proper rendering.
- Optimize for Mobile – Ensure readability on all devices.
- Limit Colors & Fonts – Maintain brand consistency.
- Include Essential Information Only – Avoid excessive links or images.
Using External Tools to Generate Professional Signatures
Several online tools can help create professional email signatures:
Common Mistakes to Avoid in Email Signatures
- Using too many colors and fonts.
- Overloading with unnecessary details.
- Not ensuring a mobile-friendly format.
- Forgetting to test across different email clients.
Conclusion
A well-designed Outlook 365 signature enhances communication, strengthens brand identity, and maintains professionalism. Whether setting up a personal or organization-wide signature, Outlook 365 provides powerful tools to create and manage signatures efficiently.
FAQs
- How can I add an image to my Outlook email signature?
Go to Signature Settings, click Insert Picture, and upload your image. - Can I use a different signature for replies and forwards?
Yes, Outlook allows setting separate signatures for new emails and replies/forwards. - Is it possible to add a disclaimer in every email signature?
Yes, organization-wide signatures can include legal disclaimers using Exchange Admin Center. - How do I ensure my email signature is mobile-friendly?
Use simple fonts, limit images, and test across multiple devices.
- What should I do if my email signature is not appearing in Outlook?
Ensure it is enabled under Settings and properly configured for the correct email account.
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