Outlook doesn't make signatures especially hard, but it does make them slightly confusing. The desktop app and the web version each keep signature settings in different menus, which means instructions that work for one don't always apply to the other. On top of that, Outlook is pickier than Gmail about what you paste in — it has its own rich-text editor that can quietly reformat things if the HTML isn't clean. The good news is that if you start from something designed for email, the paste usually survives fine. This guide covers both the desktop app and Outlook on the web, and what to do when the formatting doesn't survive.
Outlook web vs. the desktop app — which one are you in?
This matters more than it sounds. Outlook on the web (outlook.com or the browser-based Microsoft 365 version) and the Outlook desktop application are different products with different settings screens. Instructions for one don't reliably transfer to the other.
The quickest way to tell: if you're looking at a browser tab with Outlook in it, you're on the web version. If it's a full window that opens from your taskbar or dock, that's the desktop app. Identify which one you're using before you follow any steps — it saves a frustrating ten minutes of looking in the wrong place.
Both versions support rich formatted signatures with a logo, links and styled text. The process is just slightly different, and we'll cover each one.
Build your signature before you open Outlook
The same advice applies here as anywhere: finish the signature before you touch the email client. In Signoff Studio, add your name, role, company name, the one or two links you actually want in there, and a logo if you have one. Check the live preview — what you see is exactly what gets copied.
If you're uploading a logo, wait for it to finish loading before you hit Copy signature. A logo that hasn't fully loaded copies as a broken image reference, which shows up blank in Outlook regardless of how carefully you paste.
Once the preview looks right, click Copy signature. This puts a clean, email-safe copy on your clipboard — tables, inline styles, links and all.
Adding your signature in Outlook on the web
Open Outlook in your browser and click the gear icon in the top-right corner to open Settings. In the search bar at the top of the settings panel, type "signature" — this is the fastest way to find it, since Outlook on the web buries the signature option a few levels deep otherwise. Click "Email signature" from the results.
On the signature settings page, click "New signature" and give it a name you'll recognize. Then click inside the editing area and paste your signature with Cmd+V (Mac) or Ctrl+V (Windows). The layout, spacing and links should come through intact.
Once it's pasted, scroll down to the "Select default signatures" section. Set your new signature as the default for both new messages and replies, then click Save. That's the step the web version requires that the desktop app doesn't make as obvious — without saving here, the signature won't stick.
Adding your signature in the Outlook desktop app
In the desktop application, go to File in the top menu, then Options, then Mail. In the Mail section, click the Signatures button — this opens the Signatures and Stationery dialog, which is where all of Outlook's signature management lives.
Click New to create a signature, give it a name, and then click in the large editing box at the bottom of the dialog. Paste your signature here. You should see the formatted version appear — name, role, logo if you included one.
In the top-right area of the same dialog, choose your new signature from the dropdowns for "New messages" and "Replies/forwards." Click OK to close the dialog, then OK again to close Options. The desktop app saves automatically when you close — no separate Save button to hunt for.
A note for Outlook on Mac
If you're using Outlook for Mac, the path is slightly different: go to Outlook in the menu bar, then Preferences, then Signatures. From there, click the + button to create a new signature. The editing area works the same way — paste in, set it as the default, and you're done.
One quirk specific to Mac: Outlook for Mac sometimes strips link formatting if you paste and then click somewhere else before setting the default. Paste, set the default immediately, then close the preferences window — that order tends to keep the links intact.
Setting defaults and managing multiple signatures
If you only have one email account in Outlook, setting the default is straightforward — assign the signature to that account for new messages and for replies. Done.
Multiple accounts complicate things a little. Outlook lets you assign a different signature to each account, which is genuinely useful if you have both a work address and a personal one, or if you manage multiple clients. Just select each account from the dropdown and assign the right signature. It also means a new employee using a shared Outlook setup can configure their own signature without affecting anyone else's.
Whether you want the same signature on replies as on new messages is a matter of preference. Some people prefer a shorter plain-text sign-off on replies to keep threads readable. If that's the case, you can create a minimal second signature — just your name and maybe one link — and set that as the reply default.
Test before you send anything real
Open a new compose window and check that the signature appears automatically. Then send a test email to yourself and open it — once on a desktop and once on your phone if you can manage it.
Things that look fine in the Outlook compose window occasionally render differently in the received version, especially across different email clients. If a colleague uses Gmail, send them the test too and ask them to check it. A few minutes here is worth it.
When something goes wrong
- Spacing is doubled or collapsed: you likely pasted through a document or text editor first. Re-copy straight from Signoff Studio and paste directly into the Outlook signature editor.
- Logo is missing or appears as a broken image: the image didn't finish uploading before you copied. Go back to the builder, wait for the logo to load fully in the preview, then copy again.
- Links aren't clickable: this usually happens when you edit the pasted text manually inside Outlook's editor. Re-copy and paste fresh without making edits in the Outlook box.
- Outlook is reformatting the text: Outlook's editor can apply its own font styles on top of pasted content. If you see mismatched fonts, look for an "A" or font selector in the editor toolbar and clear the formatting — or paste using Ctrl+Shift+V (paste as plain, then switch back to the rich copy).
- Looks fine in new messages but not in replies: double-check that you've set the signature default for replies separately — Outlook treats new messages and replies as two separate settings.
The Outlook mobile app is a different story
The Outlook mobile app has its own signature setting, separate from the desktop and web versions. It doesn't pull your formatted signature from either — you'd have to set it there independently.
The honest limitation: Outlook's mobile app signature field is plain text. It won't carry your formatted, logo-included signature the way the desktop and web versions do. This isn't something specific to how the signature was built — it's a constraint of the app. A plain typed sign-off is the practical option for mobile replies until that changes.
If the majority of your email goes out from a desktop or the web version, this matters less than it sounds.
Two paths, same result
Whether you're in Outlook on the web or the desktop app, the actual work is short — open the right settings screen, paste a signature that was built to survive email, set the defaults, save. The steps look different between the two versions, but the outcome is the same.
If you haven't set up your signature yet, build it in Signoff Studio first, then come back here and follow whichever path matches your Outlook setup. The whole thing takes under five minutes.
Create your signature
Put this into practice — pick a template, add your details and copy a polished signature into your inbox in minutes.