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

- 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.
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.
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.
Launch the Outlook app on your iPhone and tap the 'New Message' button to start composing an email.
Above the keyboard or at the bottom of the compose window, tap the paperclip icon.
Choose 'Attach File', browse your iPhone's Files app or connected cloud storage, and select the multiple PDF documents you want to attach.

Share Multiple PDFs via Cloud Storage Links
Upload your PDFs to a cloud service and share a single link instead of attaching multiple heavy files directly.
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. Open WPS Office: Launch the WPS Office app on your iPhone and navigate to the 'Files' tab.
- 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. 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.

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.




