How to Fix Client Errors When Releasing Quarantined Messages in Microsoft 365
Question details
Users encounter a client error preventing them from successfully releasing a quarantined email message.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Attempting to release a quarantined email from the Microsoft 365 Defender portal or through a quarantine notification email.
- Observed behavior
- The system displays a client error and fails to release the quarantined message to the user's inbox.
Ensure you have a stable internet connection and verify that your Microsoft 365 account has the appropriate permissions to view and release quarantined messages.
Troubleshoot Network Connectivity and Browser Issues
Clear your local DNS cache and try alternative browsers or networks to rule out local connectivity problems causing the client error.
Client errors during the quarantine release process are frequently caused by stale DNS records, corrupted browser caches, or temporary network interruptions on your local device.
Open the Command Prompt as an administrator by searching for 'cmd' in the Windows Start menu, right-clicking it, and selecting 'Run as administrator'. Type 'ipconfig /flushdns' and press Enter.
Open the Microsoft 365 Defender portal in a private or incognito browsing window, or use a completely different web browser (such as Edge, Chrome, or Firefox) to bypass cached data.
If the issue persists, disconnect from your current network and connect to a different Wi-Fi network or a mobile hotspot to determine if the issue is network-specific.
Release Messages via Microsoft 365 Defender Portal (Admins)
If end-user release fails, Microsoft 365 administrators can manually locate and release the message directly from the centralized admin center.
Release the Message Using Exchange Online PowerShell (Admins)
Administrators can bypass web portal interfaces entirely by releasing the quarantined email directly via PowerShell commands.
Enhance Your Productivity with WPS Office
While resolving Microsoft 365 email and quarantine portal errors, you may be looking for a reliable, lightweight, and completely free alternative for your daily document processing needs. WPS Office offers excellent compatibility with Microsoft Word, Excel, and PowerPoint files, working perfectly offline without complex admin portals.
- 1. Download WPS Office: Visit the official WPS website at wps.com and click the free download button for your operating system.
- 2. Install the Software: Run the downloaded installer and follow the quick, on-screen setup instructions.
- 3. Open Your Documents: Launch WPS Office and seamlessly open, edit, and save your existing Microsoft Office files without any formatting loss.
Frequently Asked Questions
Why do I get a client error when releasing quarantined emails in Microsoft 365?
Client errors are generally caused by localized issues such as corrupted browser cache, outdated DNS records, temporary network disconnects, or occasionally service outages on Microsoft's servers.
Can standard users fix quarantine release errors on their own?
Users can often resolve the issue if it is caused by their local browser or network by clearing their DNS cache and trying a different browser. However, if the issue stems from Microsoft's servers or strict policy rules, they must contact their IT administrator.
What permissions do admins need to release quarantined messages?
An administrator must be assigned the Security Administrator role, or be a member of the Quarantine Administrator role group within the Microsoft 365 Defender portal, to release messages on behalf of end-users.
How can I check if Microsoft 365 is experiencing a service outage?
Administrators can log into the Microsoft 365 admin center and navigate to 'Health' > 'Service health' to view active advisories or incidents affecting Exchange Online and Microsoft Defender.
