Outlook Disconnected from Server? Fix Connection Failed & Offline Errors
If Microsoft Outlook shows “Disconnected from Server”, “Connection Failed”, or stops syncing emails, this usually means Outlook cannot reach the mail server correctly.
This guide explains why Outlook disconnects and how to fix the issue on Windows 10 and Windows 11 — safely and step by step.
Common Outlook Connection Errors
- Outlook status shows Disconnected
- Error: Connection to Microsoft Exchange is unavailable
- Emails stuck in Outbox
- Folders not updating or syncing
Fix 1: Disable Work Offline Mode
Outlook may appear disconnected if Offline mode is enabled.
- Open Outlook
- Click Send / Receive
- Ensure Work Offline is turned off
Fix 2: Check Account Server Connection
Incorrect server authentication can disconnect Outlook.
- Go to File → Account Settings → Account Settings
- Select your email account
- Click Repair
If repair fails, server settings may need reconfiguration.
Fix 3: Restart Outlook in Safe Mode
Add-ins frequently break Outlook’s server connection.
- Press Windows + R
- Type
outlook.exe /safe - Press Enter
If Outlook connects in Safe Mode, disable add-ins:
File → Options → Add-ins → COM Add-ins
Fix 4: Repair Outlook Data File (OST / PST)
A corrupted data file can block server sync.
Follow this guide: Repair Outlook OST & PST Files
Fix 5: Reset Network & Proxy Settings
Proxy or VPN settings can cause Outlook connection failures.
- Press Windows + R
- Type
inetcpl.cpl - Open Connections → LAN settings
- Disable proxy server
Fix 6: Create a New Outlook Profile
If Outlook remains disconnected, creating a new profile often fixes the issue.
See: How to Create a New Outlook Profile
Related Outlook Connection Fixes
- Outlook Not Connecting to Server
- Outlook Can Send but Not Receive Emails
- Outlook Keeps Asking for Password
Final Notes
Outlook connection issues are usually caused by profile corruption, network configuration, or authentication errors. Fixing these restores email sync without reinstalling Office.