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Fix Cannot Open PDF Files on iPhone or iPad with Microsoft 365
Question details
The user is unable to open or view PDF files on an iPhone and iPad, encountering unexpected prompts to purchase premium third-party apps instead of using their existing Microsoft 365 subscription tools.
- Product
- Microsoft 365
- Device & OS
- iOS (iPhone/iPad)
- Scenario
- Trying to open a downloaded or received PDF file on an Apple mobile device.
- Observed behavior
- The device fails to open the document properly or redirects the user to buy paid applications like 'PDF X' or 'Pro' instead of using a free or included PDF reader.
Ensure your iPhone or iPad is connected to the internet and that you are actively signed into your Microsoft account within the Microsoft 365 mobile app.
Install a Dedicated Free PDF Reader from the App Store
Since the PDF format is an open standard, you can bypass paid app prompts by installing a legitimate, free PDF reader app like Adobe Acrobat Reader or WPS Office to handle all your documents.
Often, iOS users inadvertently install third-party 'freemium' apps that hijack PDF links and demand payment. Uninstalling those apps and replacing them with standard free readers will restore your ability to open PDFs without paying.
Open the App Store on your iPhone or iPad, tap the 'Search' tab, and type 'Adobe Acrobat Reader' or 'WPS Office'.
Tap 'Get' next to the official, free application to download and install it onto your device.
Locate the PDF file you are trying to read, tap the iOS 'Share' icon (a square with an upward arrow), and select your newly installed PDF reader from the app list.
Verify Your Microsoft 365 App Sign-In Status
If you prefer to use the Microsoft 365 mobile app to view your documents, you must ensure your subscription is actively syncing on your iOS device.
Use the Native Apple Files App
Apple's iOS includes a built-in Quick Look previewer capable of opening basic PDF documents without requiring you to download or subscribe to any third-party software.
Easily Open and Edit PDFs on iOS with WPS Office
If you are struggling to open PDFs or experiencing limitations with other office apps on your iPhone or iPad, WPS Office provides a powerful, all-in-one mobile solution. It opens PDFs instantly for free and handles all standard document formats without constant upgrade interruptions.
- 1. Download the App: Search for 'WPS Office' in the Apple App Store and tap 'Get' to install it on your device for free.
- 2. Locate Your PDF File: Find the PDF you wish to read in your email, messaging application, or the iOS Files app.
- 3. Share and Open: Tap the iOS Share button, scroll through the app options, and select 'WPS Office' to instantly launch and read your document.
Frequently Asked Questions
Why is my iPad asking me to buy a 'Pro' app just to read a PDF?
This happens when you accidentally install a freemium third-party PDF reader that aggressive prompts for paid upgrades. You can avoid this by using genuinely free apps like Adobe Acrobat Reader or WPS Office, or by using the built-in iOS Files app.
Does my Microsoft 365 subscription include a PDF reader for iOS?
The Microsoft 365 mobile app includes basic PDF viewing capabilities. However, PDF is an open standard not owned by Microsoft. You do not need a paid Microsoft subscription just to open and read standard PDF files on an iPhone or iPad.
How can I change the default PDF reader on my iPhone?
Unlike desktop computers, iOS does not allow you to set a system-wide default app for opening PDFs. To choose which app opens your file, you must tap the Share icon on the PDF and manually select your preferred application from the share sheet menu.
