File Sharing Problems

Fix Cannot Share More Than Two PDF Documents on iPhone via Outlook

Olivia MillerOlivia Miller Oct 27, 2026 869 views

Question details

The user is unable to select and share more than two PDF documents simultaneously using Outlook on their iPhone, a feature that previously worked on their Android device.

How to Fix Cannot Share More Than Two PDF Documents on iPhone via Outlook
Product
Outlook for iOS
Device & OS
iOS
Scenario
Attempting to select multiple PDF files from a mobile device and sharing them simultaneously via the Outlook email app.
Observed behavior
The iOS Share Sheet or Outlook app restricts the user from sharing more than two PDF attachments at the same time.
Before you start

Ensure your iPhone is updated to the latest iOS version and that your Outlook app is fully updated from the App Store. Be mindful that email providers impose maximum attachment size limits (usually around 20MB to 33MB), which might restrict multiple file sharing if the PDFs are large.

Solution 1Recommended

Attach Files Directly from Within the Outlook App

Instead of using the iOS Share Sheet from your file manager, use the native attachment feature inside the Outlook app to bypass third-party sharing restrictions.

The iOS Share Sheet sometimes restricts memory and background processing when passing multiple files to third-party apps like Outlook. Attaching files directly from within the app sidesteps this system limitation.

1
Compose a new email

Launch the Outlook app on your iPhone and tap the 'New Message' button to start composing an email.

2
Tap the attachment icon

Above the keyboard or at the bottom of the compose window, tap the paperclip icon.

3
Select your files

Choose 'Attach File', browse your iPhone's Files app or connected cloud storage, and select the multiple PDF documents you want to attach.

Attach Files Directly from Within the Outlook App
File Size Warning: If you still cannot attach the files, double-check that the combined size of the PDFs does not exceed your email provider's attachment limit.
Seamless Mobile Document Sharing

Manage and Share Multiple PDFs Easily with WPS Office for iOS

WPS Office for iOS provides a robust built-in file manager and deep cloud integration, allowing you to easily manage, select, compress, and share multiple PDF documents directly as links or attachments, bypassing native OS sharing frustrations.

  1. 1. Open WPS Office: Launch the WPS Office app on your iPhone and navigate to the 'Files' tab.
  2. 2. Select Multiple Files: Tap the checkmark icon in the top right to enter multi-select mode, then choose the PDF documents you want to share.
  3. 3. Choose Sharing Method: Tap 'Share' at the bottom and select 'Share as Link' or 'Send as Attachment' to seamlessly pass the files to Outlook or your preferred email client.
Select and share multiple documents as email attachments effortlessly.Easily generate cloud links for large files to avoid email size limits.Fully compatible with Microsoft Office formats and standard PDFs.Built-in PDF compression to reduce file sizes before sharing.
microsoft office alternative - wps office

Frequently Asked Questions

Why does iOS limit the number of files I can share at once to Outlook?

iOS places strict memory limits on its Share Sheet extensions to maintain system stability. When you try to pass multiple files to a third-party app like Outlook, the extension may crash or silently block the transfer if the combined file size or quantity exceeds this memory threshold.

Is there an email attachment size limit in Outlook for iOS?

Yes, Outlook restricts total email attachments based on your email provider. For Exchange and Outlook.com, the limit is typically 33 MB, while Gmail and others usually limit attachments to 20 MB or 25 MB. Exceeding this will prevent files from attaching.

How can I reduce the file size of my PDFs to make sharing easier?

You can use a PDF editor like WPS Office to compress the PDF files before sharing. Alternatively, compressing the files into a single ZIP archive on your iPhone can reduce the overall size and consolidate them into one file, bypassing multi-file sharing restrictions.

Can I use the native Apple Mail app instead to share multiple PDFs?

Yes, the native Apple Mail app has deeper system integration with iOS and can often handle larger loads via the Share Sheet without issue. If Outlook continues to fail, try selecting the files and sharing them via Apple Mail instead.