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Other PDF Issues

How to Use Adobe Fill & Sign with Outlook for Mobile on iOS

Natalie TaylorNatalie Taylor Oct 23, 2026 869 views

Question details

Users need to open and sign PDF attachments received via the Outlook mobile app on iOS using Adobe Fill & Sign.

How to Use Adobe Fill & Sign with Outlook for Mobile on iOS
Product
Outlook Mobile / Adobe Fill & Sign
Device & OS
iOS (iPhone/iPad)
Scenario
Receiving a PDF document via email in the Outlook iOS app that requires immediate filling and signing.
Observed behavior
Adobe Fill & Sign does not directly integrate into the Outlook app's native attachment viewer, preventing users from opening the file straight into the signing tool.
Before you start

Ensure that both the Microsoft Outlook app and the Adobe Fill & Sign app are updated to their latest versions from the App Store.

Solution 1Recommended

Save the PDF Attachment and Open it in Adobe Fill & Sign manually

Since there is no direct integration, you must save the PDF file from Outlook to your local iOS files first, and then import it into Adobe Fill & Sign.

While direct app-to-app integration is not available between Outlook for iOS and Adobe Fill & Sign, you can easily bridge the gap using the native Apple 'Files' app.

1
Open the email attachment

Launch the Outlook app on your iOS device, navigate to the specific email, and tap the PDF attachment to open the preview.

2
Share and save the file

Tap the 'Share' icon (a square with an upward-pointing arrow) in the top-right corner of the screen, scroll down, and select 'Save to Files'. Choose a recognizable folder on your iPhone or iPad.

3
Launch Adobe Fill & Sign

Exit Outlook and open the Adobe Fill & Sign app from your home screen.

4
Import and sign the PDF

Tap the '+' icon or 'Select a form to fill out', choose 'File Browser', and locate the PDF you just saved. The document will open, allowing you to fill out form fields and add your signature.

Save the PDF Attachment and Open it in Adobe Fill & Sign manually
Returning the Document: Once signed, you can tap the Share button inside the Adobe app and select the Outlook icon to instantly attach the signed PDF to a new email.
All-in-One PDF Solution

Easily Read, Fill, and Sign PDFs on iOS with WPS Office

Skip the hassle of saving files back and forth between multiple apps. WPS Office provides a comprehensive mobile suite that allows you to directly open, fill, sign, and share PDF attachments seamlessly on your iPhone or iPad.

  1. 1. Open PDF with WPS: Tap the PDF attachment in Outlook, tap the Share icon, and select WPS Office from your app list.
  2. 2. Access the Fill & Sign tool: Once the document opens in WPS Office, select the 'PDF Edit' or 'Fill & Sign' option from the bottom toolbar.
  3. 3. Sign the document: Create or insert your saved digital signature and place it anywhere on the document.
  4. 4. Share directly: Save the changes and use the built-in share feature to email the signed document immediately.
Built-in PDF editor to fill forms and add digital signatures instantly.Seamlessly open PDF attachments from any email client, including Outlook iOS.Fully compatible with standard PDFs and Microsoft Office formats (Word, Excel, PowerPoint).Lightweight, all-in-one app that combines document creation and PDF management.
microsoft office alternative - wps office

Frequently Asked Questions

Can I directly tap a PDF in Outlook iOS and open it in Adobe Fill & Sign?

No, Outlook for iOS does not offer direct native integration to immediately launch Adobe Fill & Sign. You need to save the file to your device's Files app first, or attempt to route it via the iOS Share sheet.

How do I reply to the original email with the signed PDF?

After signing the document in Adobe Fill & Sign, tap the 'Share' icon. If you select Outlook, it creates a new draft. To reply, it is best to save the signed PDF to your Files app, go back to your original Outlook email, tap 'Reply', and attach the newly signed file from your local storage.

Are there built-in alternatives to sign a PDF on iOS without downloading another app?

Yes. When previewing a PDF attachment in the Outlook iOS app, you can tap the Share icon, select 'Markup' (or save to Files and use Markup there), and use Apple's native signature tool to sign the document before sharing it back.