Email signature

In Outlook on the web, the rich formatting options for the email signature (fonts, colors, images, etc.) are only available in the full signature editor under Settings → Mail → Layout → Email signature. If the font boxes and other formatting controls are greyed out, it typically means the editable rich-text area is not active or is being blocked.

Use these steps to edit the signature with full formatting:

1. In Outlook on the web, select Settings (gear icon) in the top-right corner.
2. Select Options > Mail.
3. Under Layout, select Email signature.
4. In the Email signature text box, click inside the box to activate it. Once the cursor is in the box, the formatting bar (font, size, color, alignment, image, etc.) should become active.
5. Create or edit the signature, then select Save.

If the text box itself is not editable or the formatting bar remains disabled, this can be caused by the browser or server configuration. In similar cases with Outlook Web App, installing the appropriate server update resolved issues where the signature editor’s rich text controls were disabled.

If the problem persists across browsers and sessions, contact the mail or Exchange administrator to check for any known issues or required updates on the server side.

References:

• Customize your email message in Outlook on the web
• The E-mail Signature text box is not editable in Outlook Web App when you use Google Chrome in an Exchange Server 2010 environment