How to Fix SharePoint iPhone App Signing Out Every Time It Closes
Question details
The user needs to prevent the SharePoint iOS app from requiring a manual sign-in every time it is launched.
- Product
- Microsoft SharePoint App
- Device & OS
- iOS
- Scenario
- Opening and closing the SharePoint mobile application on an iPhone.
- Observed behavior
- The app fails to retain user credentials and forces a manual sign-in every time it is closed and reopened, despite basic troubleshooting like reinstalling and resetting passwords.
Verify that your Microsoft Authenticator app (if installed) is updated to the latest version, as it handles the single sign-on (SSO) tokens for Microsoft 365 applications.
Accept the 'Remain Signed In' Prompt
Ensure the app generates a persistent refresh token by explicitly accepting the keep-signed-in prompt during the login process.
When you log into Microsoft 365 services on a mobile device, the system issues a persistent refresh token. If this token is not stored correctly, the app will forget your session as soon as it is closed.
Launch the SharePoint application on your iPhone and enter your email address to begin the sign-in process.
Input your password and complete any required Multi-Factor Authentication (MFA) prompts.
When the 'Stay signed in?' or 'Don't show this again' prompt appears on the screen, be sure to tap 'Yes' to allow the app to store a persistent refresh token.
Contact Your Microsoft 365 Administrator
If the issue is isolated to a single device after standard troubleshooting, your organization's Conditional Access policies might be blocking the token.
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Frequently Asked Questions
Why does SharePoint keep asking me to sign in on my iPhone?
This usually happens when the app fails to store a persistent refresh token, you declined the 'Stay signed in' prompt, or your organization's IT policies enforce strict session timeouts for mobile devices.
Does clearing the app cache fix the SharePoint login loop?
Clearing saved details and reinstalling the app can clear corrupted login tokens. However, if that doesn't work, the issue may be related to your specific device environment or Azure AD backend policies rather than cached data.
Can Microsoft Authenticator cause SharePoint login issues?
Yes, if the Microsoft Authenticator app is outdated or has corrupted data, it can prevent single sign-on (SSO) tokens from passing correctly to the SharePoint mobile app.
How do I check if my IT admin is forcing the logouts?
You cannot check this directly from the SharePoint mobile app. You must contact your Microsoft 365 administrator and ask them to review the Azure AD sign-in logs and Conditional Access policies applied to your user account.
