Set a Different Signature Per Account in Outlook Mobile

A different outlook mobile signature per account is built into both the iOS and Android apps as a single setting called Per Account Signature. Turn it on inside Settings and Outlook stops sharing one signature across every mailbox, letting you write a fuller one for your work Exchange account and a plainer one for a personal Gmail or iCloud mailbox in the same app.

The toggle itself takes about a minute. What actually sends people searching is the second half of the question: a corporate HTML signature that looks correct in Outlook on the web or the desktop app frequently does not appear on the phone at all, or shows up stripped down with the logo missing. That's not a broken signature. It's two separate signature systems that were never built to sync.

This comes up constantly for anyone who runs a work Exchange mailbox and a personal account side by side in one app, which is most people who install Outlook mobile in the first place. This guide covers both problems in the order you'll hit them: turning the toggle on for iPhone and for Android, what genuinely differs between the two editors underneath it, and the specific reasons a signature that was working stops showing up once you've already set it up correctly.

Before you start#

A few things decide which of the steps below actually apply to your setup, so check them before you start tapping through menus.

• Which accounts are already connected. Per Account Signature only has something to switch between once Outlook mobile has two or more mailboxes added — with a single account, the toggle exists but does nothing useful. Check now by opening Settings, then Accounts, and counting what's actually listed; it's easy to forget a second Outlook.com or shared mailbox is still connected.
• Your current app version. Microsoft has relocated this setting across releases, and it can sit one menu level higher or lower depending on what you're running. Update the app first if you haven't in a while — if it still isn't where these steps say, use the search field at the top of Settings and type signature.
• Whether your organization manages your signature centrally. If IT applies one through an Exchange transport rule, a disclaimer add-in, or a Microsoft 365 admin policy, your phone will not necessarily inherit it. A quick way to tell: open the desktop or web version and see whether the signature there is something you typed yourself, or something that just appeared without you setting it.
• Whether you actually need an image or just text. iOS can carry over some formatting when you paste a signature in; the Android editor is plain text and links only. If a hosted logo is genuinely required for your role, plan for it to look different, or be missing entirely, depending on which platform reads the mail.

Set a per-account signature on iPhone or iPad#

1. 1

   Open Settings inside Outlook

   Tap your profile picture in the top-left corner of the inbox, then tap the gear icon for Settings.

2. 2

   Find Signature

   Scroll to the Mail section and tap Signature. On some current builds this sits one level higher, directly under Settings rather than nested under Mail — Microsoft has shuffled this exact submenu across several releases, so don't assume a screenshot from an older support thread matches what you see.

3. 3

   Turn on Per Account Signature

   Flip the toggle at the top of the screen. A list of every connected account appears underneath it, each with its own empty signature field waiting to be filled in separately.

4. 4

   Write or paste each signature

   Tap an account, clear the default "Get Outlook for iOS" text, then type or paste your signature. A small formatting bar appears above the keyboard once you tap into the field, giving you bold, italic, underline, and a link button if you'd rather build it by hand than paste one in. Pasting from a document or email usually keeps that formatting; an embedded logo is more hit or miss.

5. 5

   Repeat per account, then confirm

   Do the same for every account that needs its own text. Tap the back arrow to save, then start a new email from each account to confirm the right signature actually shows up.

Set a per-account signature on Android#

1. 1

   Open Settings

   Tap your profile picture at the top-left of the inbox, then tap the gear icon.

2. 2

   Tap Signature

   It's under the Mail section on most current versions. If you don't see it there, use the search bar at the top of the Settings screen instead of hunting through menus.

3. 3

   Turn on Per Account Signature

   This swaps the single shared field for a separate signature field per connected account, the same behavior as on iOS.

4. 4

   Type your signature in plain text

   The Android editor supports typed text and hyperlinks — highlight text, tap Add link, and paste the URL. It does not support inline images, so a logo copied in from somewhere else gets dropped or stripped out. There's no formatting bar for bold or italics beyond what a plain hyperlink gives you, which is the single biggest reason a signature that looks polished on desktop looks flat here.

5. 5

   Save and test

   Back out of Settings, start a new message from the account you just edited, and confirm the signature is actually there before you rely on it for real mail.

iOS vs Android: what actually differs#

Both platforms use the same toggle name and land in roughly the same part of Settings, but the two editors underneath it are not equivalent. The gap matters most when you're trying to match a signature someone designed on a desktop.

None of this makes Android the worse app. Its signature editor is built around the assumption that most people typing on a phone don't need a rendered logo mid-message, and a plain-text signature is genuinely more reliable across mail clients on the receiving end than an image ever is. If your role truly requires a logo, iOS gets you closer to it, but not a guarantee — Android gets you a clean text block that shows correctly every single time instead.

What to do when it doesn't work#

Most Outlook mobile signature problems trace back to one of five causes, and they overlap enough that fixing the wrong one wastes a lot of time. Work out which one you actually have before you spend more time retyping the same text.

A faster way to keep signatures consistent#

Recreating the right signature by hand across two mobile editors is a one-time chore until you switch phones, add an account, or someone updates the company template — then it's a chore again, on every device, for every person who has to redo it.

AI Emaily keeps one signature per connected account tied to your identity and applies it the same way across web, desktop, and mobile, with no separate mobile-only editor to fight with. Its AI drafting keeps every reply in the same voice and sign-off whether you're answering from a laptop or a phone between meetings. We build AI Emaily, and it connects Gmail, Outlook, and IMAP accounts side by side, so switching doesn't mean re-learning a new signature system for each one.