How To Adjust Your Email Signature in Outlook (Desktop, Web, and Mobile)

Outlook signatures look simple, but they’re doing a lot of work for you: they carry your contact details, job title, legal disclaimers, and sometimes branding. Knowing how to adjust your signature in Outlook means you can keep all of that up to date across devices without retyping it every time.

This guide walks through what an Outlook signature actually is, how it behaves on different platforms, and the main ways you can tweak it. Along the way, you’ll see where your own setup and needs change the “right” way to configure things.

What an Outlook Signature Really Is

In Outlook, an email signature is just a block of text (often with some formatting) that Outlook automatically inserts at the bottom of your messages. Behind the scenes, Outlook treats it like a tiny template that’s stored on your device or in your account settings.

Key things to understand:

• A signature can be:
  • Plain text (just words, no styling)
  • Formatted text (fonts, colors, sizes, links)
  • HTML (images, logos, tables, social icons)
• You can have multiple signatures and choose:
  • One for new messages
  • Another (or none) for replies and forwards
• Where it’s stored depends on the platform:
  • Outlook desktop (Windows/Mac): stored locally for that profile
  • Outlook on the web (Outlook.com / Microsoft 365): stored in your mailbox and follows you in a browser
  • Outlook mobile apps: has its own, separate signature setting

That’s why your signature on your work laptop might look polished and branded, while your phone sends emails with “Sent from my phone” unless you change it.

How To Adjust Your Signature in Different Versions of Outlook

Because Outlook runs on several platforms, the steps change slightly depending on where you’re using it.

1. Adjusting Your Signature in Outlook for Windows

Applies to: Outlook desktop app on Windows (Microsoft 365 / Outlook 2019+ style interface)

Basic steps:

1. Open Outlook.
2. Go to File → Options.
3. In the left column, select Mail.
4. Click the Signatures… button (near the “Create or modify signatures for messages” text).
5. In the E-mail Signature tab:
   • Select a signature under Select signature to edit (or click New to create one).
   • Adjust the text, formatting, and layout in the Edit signature box.
6. Under Choose default signature:
   • Pick your email account.
   • Choose which signature to use for New messages.
   • Choose which signature to use for Replies/forwards (or “(none)” to leave them without a signature).
7. Click OK to save.

Quick manual changes while writing an email:

• In a new message window, go to the Message tab.
• Click Signature on the toolbar.
• Choose a different signature or Signatures… to edit.

This lets you swap signatures on the fly if you don’t want the default one for a specific message.

2. Adjusting Your Signature in Outlook for Mac

Applies to: Outlook desktop app on macOS (new and “classic” Outlook look similar for this feature)

Basic steps:

1. Open Outlook on your Mac.
2. Go to Outlook → Settings (or Preferences, depending on version).
3. Click Signatures.
4. In the list:
   • Select an existing signature to edit, or
   • Click the + button to create a new one.
5. Edit the content in the right-hand panel:
   • Change text, add links, adjust fonts, or insert images (depending on version and policies).
6. Set default signatures:
   • Look for options like Choose default signature or per-account signature settings.
   • Assign a signature for New messages and one for Replies/forwards for each account you use.
7. Close the settings window; Outlook usually saves automatically.

If you’re composing an email:

• Click the Signature button in the message toolbar.
• Pick which signature you want just for that message.

3. Adjusting Your Signature in Outlook on the Web (Outlook.com / Microsoft 365)

Applies to: Outlook in a web browser (work or personal accounts)

Basic steps:

1. Open Outlook in your browser and sign in.
2. Click the gear icon (Settings) in the top-right corner.
3. At the bottom of the panel, click View all Outlook settings.
4. Go to Mail → Compose and reply.
5. Under Email signature:
   • Create or edit your signature in the editor box.
   • Use the formatting toolbar for bold, colors, lists, and links; you can often paste images or logos here.
6. Under the signature editor, set:
   • Automatically include my signature on new messages I compose
   • Automatically include my signature on messages I forward or reply to
7. Click Save.

If you leave both options off, you can still insert the signature manually while composing by clicking the three dots (More options) in the compose window and choosing Insert signature (exact wording can vary slightly).

4. Adjusting Your Signature in Outlook Mobile (iOS and Android)

Outlook’s mobile apps handle signatures more simply than the desktop or web versions.

Basic steps (iOS/Android):

1. Open the Outlook app on your phone or tablet.
2. Tap your profile picture or the menu icon (☰), then tap the gear icon for Settings.
3. Scroll to find Signature.
4. Edit the signature text:
   • Many versions only support plain text (no fancy formatting).
   • Replace any default like “Sent from Outlook for iOS/Android” with your preferred text.
5. If you have multiple accounts, check if the app:
   • Uses one shared signature for all accounts, or
   • Lets you set per-account signatures (depends on the version and account type).
6. Exit the settings; changes usually save automatically.

Remember that mobile signatures are separate from your desktop or web signatures. Changing one doesn’t automatically update the others.

What You Can Adjust in an Outlook Signature

Once you’re in the right place for your version of Outlook, you can tune several aspects:

Content and Layout

Common elements people include:

• Name and title
• Company or organization
• Phone number(s) and alternative contact options
• Website URL
• Social media links (often as text or icons)
• Legal disclaimers or compliance messages (if required)

Layout choices:

• Simple line-by-line text
• A two-column layout created with a small table (logo on the left, text on the right) in desktop/web versions
• Shortened signatures for replies to avoid clutter

Formatting and Style

In desktop and web Outlook, you can adjust:

• Font (typeface, size, color)
• Bold/italic/underline for emphasis
• Bullet lists for clarity
• Hyperlinks on text or images

In mobile Outlook, you’re usually limited to plain text, so any rich formatting from your desktop signature won’t carry over.

Images and Logos

Depending on your version and settings, you may:

• Insert an image file (e.g., a logo) into your signature
• Link that image to your website or profile
• Use hosted images (where the picture is loaded from the web when someone views your email)

Some organizations disable this or enforce centrally managed signatures for consistency and security.

Key Variables That Affect How Your Signature Works

The way your signature looks and behaves isn’t just about Outlook itself. Several variables shape what’s possible and what makes sense.

1. Outlook Platform and Version

Different platforms support different features:

If you switch between platforms regularly, you’ll see differences in how your signature appears.

2. Account Type and Organization Policies

Your email account type matters:

• Work or school accounts (Microsoft 365/Exchange):

  • IT may enforce a specific signature style.
  • Organization-wide signatures might be added after you send, on the server side.
  • Some settings, like images or external links, can be restricted.

• Personal Outlook.com or connected accounts (Gmail via Outlook, etc.):

  • You usually have more freedom to design any signature you like.
  • Defaults and behavior can vary depending on how the account is connected.

3. Device Mix and Where You Send Most Emails

Your main sending device shapes what’s practical:

• If you send mostly from a desktop, you can rely on rich, brand-style signatures.
• If you send a lot from mobile, a shorter, cleaner text-based signature might be easier to maintain and read.
• If you move between work and personal devices, you might maintain different signatures or a minimal shared one.

4. Professional Context and Branding Needs

Your role affects what belongs in a signature:

• Corporate roles:
  • May need full details, legal disclaimers, and specific branding elements.
• Freelancers/independent professionals:
  • Might emphasize portfolio links or scheduling links.
• Personal use:
  • Often just a name and maybe one contact method to avoid clutter.

What’s appropriate in length and tone depends heavily on who you email and why.

5. Recipient Experience and Email Clients

Not everyone reads email in Outlook. Other email clients may:

• Strip or alter formatting
• Block remote images by default
• Display fonts differently

This is why many people keep signatures simple and robust: mostly text, with a bit of careful formatting that degrades gracefully if stripped.

How Different User Profiles Adjust Signatures Differently

The same Outlook tools can be used very differently depending on who’s using them.

Minimalist User

• One short, clean signature for all emails
• Text-only, no logos
• Same content on desktop and mobile, adjusted for plain text

Brand-Focused Professional

• Separate signatures for:
  • New messages: full signature with logo and links
  • Replies/forwards: shorter version
• Uses a consistent font and company colors
• Carefully tests how the signature looks on desktop and phone

Multi-Account Power User

• Different signatures per account:
  • Work address: formal, with job title and company
  • Personal address: simple, casual
• Per-account defaults set in Outlook, switching automatically when changing “From” addresses
• Sometimes manual overrides when replying to certain types of messages

Regulated or Enterprise Environment User

• Signature content and style may be partially or fully dictated by IT
• Might rely on automatic, organization-wide signatures added by the server
• Local Outlook signature perhaps reduced to just a name or left blank

Each of these setups uses the same Outlook “Signatures” feature, but with very different goals and constraints.

Where Your Own Setup Becomes the Deciding Factor

Knowing how to adjust your signature in Outlook is mostly about knowing where the setting lives in each version and what you can change there: text, layout, images, and defaults for new messages and replies.

The part that Outlook can’t decide for you is:

• How many signatures you really need
• How formal or informal they should be
• Whether to prioritize rich branding or simple, reliable text
• How to balance consistency across desktop, web, and mobile with the limits of each app
• Which details (phone, address, social links, disclaimers) are necessary for your role and your recipients

Once you’re clear on your devices, your accounts, and how you use email day to day, the actual steps to adjust your signature in Outlook are straightforward. The “right” configuration depends entirely on that personal mix.