How to Fix Outlook Synchronization Error 0x80040806
Question details
Users need to resolve Microsoft Outlook synchronization failures that trigger error codes 0x80040806 and 0x80040115.
- Product
- Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Synchronizing Outlook with the Microsoft Exchange Information Store.
- Observed behavior
- Outlook fails to synchronize with Microsoft Exchange, displaying error 0x80040806, often followed by error 0x80040115 which indicates ongoing network connectivity failure.
Ensure your computer has an active, stable internet connection and try testing your connection on a different network before proceeding.
Verify Network Connectivity and Disable Work Offline Mode
Check basic connectivity and ensure Outlook is not set to Work Offline, which prevents server synchronization.
Often, temporary network drops force Outlook into an offline state. Disabling this mode manually can restore your Exchange connection.
Verify that your computer is connected to a stable network by opening a web browser and loading a webpage.
Open Microsoft Outlook and navigate to the 'Send / Receive' tab on the top ribbon. Look for the 'Work Offline' button. If it is highlighted or greyed out, click it to reconnect to the Exchange server.
Close the Outlook application completely and restart your computer to clear any lingering network connection states.
Install Pending Office Updates
Applying the latest Office updates can resolve known bugs that cause synchronization and connectivity errors.
Create a New Outlook Profile
If the synchronization error only affects a single profile, creating a fresh Outlook profile can bypass local data corruption.
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Frequently Asked Questions
What causes Outlook Error 0x80040806?
This error is typically caused by a synchronization failure with the Microsoft Exchange Information Store. It happens due to poor network connectivity, corrupted Outlook profiles, or temporary server outages.
How is error 0x80040115 related to synchronization failures?
Error 0x80040115 usually appears after 0x80040806 and specifically indicates that your network connection is preventing Outlook from reliably connecting to the Exchange server to retrieve data.
Why does Outlook automatically go into Work Offline mode?
Outlook is designed to switch to Work Offline mode automatically if it detects a lost or unstable connection to the mail server, helping prevent the application from freezing while trying to sync. You must reconnect manually once your internet is restored.
Will creating a new Outlook profile delete my existing emails?
No. Because you are connecting to a Microsoft Exchange server, all your emails, contacts, and calendar events are safely stored on the server. Creating a new profile will simply resync that data to your computer.
