OneDrive Error Codes

Fix Microsoft 365 and OneDrive Error 2604 on iPhone or iPad

Adam Davis Sep 28, 2026 868 views

Question details

The user is unable to sign into Microsoft 365 or OneDrive apps on an iOS device due to Error 2604, despite the student account functioning normally on Windows and macOS.

How to Fix Error 2604 in Microsoft 365 and OneDrive on iOS

Product: Microsoft 365, OneDrive
Device & OS: iPhone, iPad (iOS)
Scenario: Attempting to sign into a student or school Microsoft account on a mobile device.
Observed behavior: The application displays an Error 2604 code along with a No Network Connection message, preventing access to cloud storage and office features.

Before you start

Ensure your iPhone or iPad has a stable internet connection. Try temporarily disabling any active VPNs or custom DNS profiles that might interfere with Microsoft's authentication servers.

Solution 1Recommended

Sign Out and Reinstall the OneDrive App

Clearing the app's cached credentials and performing a clean reinstallation can resolve temporary authentication and network connection glitches.

Authentication tokens on iOS can sometimes become corrupted, causing the app to incorrectly report a lack of network connection. Completely clearing the app data forces a fresh connection to Microsoft servers.

Sign out of your account

Open the Microsoft 365 or OneDrive app on your iOS device. Tap your profile picture or icon at the top, select your account, and tap 'Sign Out'.

Uninstall the app

Go to your iPhone or iPad home screen. Tap and hold the OneDrive or Microsoft 365 app icon, select 'Remove App', and then confirm by tapping 'Delete App'.

Reinstall and authenticate

Open the App Store, search for OneDrive or Microsoft 365, and download it again. Once installed, open the app and sign in using your student account credentials.

Network Check: If you are connected to a school or university Wi-Fi network, try switching to cellular data before signing in, as strict campus firewalls can sometimes block the authentication request.

Solution 2

Contact Your School IT Administrator

If the error persists across different network connections, the issue might be related to your school's specific mobile device management (MDM) policies.

Free Microsoft Office alternative

Use WPS Office for Seamless Mobile Document Editing

If Microsoft 365 sign-in errors are preventing you from completing your schoolwork on your iPhone or iPad, switch to WPS Office. It provides a lightweight, free, and highly compatible alternative that lets you view and edit documents without relying on complex organizational account setups.

Fully compatible with Microsoft Word, Excel, and PowerPoint formatsNo complicated school account sign-in required to edit local filesLightweight app optimized for smooth performance on iPhone and iPadFree to download and start creating assignments immediately

microsoft office alternative - wps office

Frequently Asked Questions

Why does Error 2604 say 'No Network Connection' when my Wi-Fi works?

Error 2604 usually indicates that the Microsoft authentication server is blocked from verifying your credentials. This is frequently caused by active VPNs, strict school firewalls, or corrupted sign-in tokens, rather than a lack of actual internet connection.

Can I access my school files while trying to fix Error 2604?

Yes, you can usually still access your school files by logging into OneDrive or Microsoft 365 via a web browser (like Safari or Chrome) on your device, or by using a Windows or macOS computer where the account is already working.

Does Error 2604 affect personal Microsoft accounts as well?

While possible, Error 2604 most commonly affects organizational and student accounts (Work or School accounts). This is due to strict device management and security policies configured by the network administrator.

Microsoft Office Error Codes