How to Fix 'Failed to Load Data' When Viewing Quarantined Email in Exchange
Question details
Users encounter a 'Failed to load data' error message when attempting to access their quarantined emails.
- Product
- Microsoft Exchange
- Device & OS
- not provided
- Scenario
- End users and non-global administrators are trying to view quarantined emails in a hybrid Exchange environment.
- Observed behavior
- The system displays a 'Failed to load data. Please try again later' message, preventing users from viewing or managing their quarantined messages.
Verify whether the affected user's mailbox is currently hosted on-premises or has already been migrated to Exchange Online, as this determines the availability of the modern quarantine viewing feature.
Migrate On-Premises Mailbox to Exchange Online
Quarantine viewing is generally not supported for on-premises mailboxes in hybrid environments. Migrating the mailbox to the cloud resolves the issue.
In hybrid Microsoft 365 environments, the modern quarantine experience requires the user's mailbox to be hosted in Exchange Online. If the mailbox is still located on-premises, users will frequently encounter data loading errors when accessing the quarantine portal.
Log in to the Exchange Admin Center (EAC) using your global or Exchange administrator credentials.
Navigate to the 'Migration' tab and create a new migration batch to move the affected on-premises user mailbox to Microsoft 365 (Exchange Online).
Once the migration completes and directories sync, instruct the user to sign in again and attempt to access their quarantined emails via the Microsoft 365 Defender portal.
Verify Quarantine Permissions and Check Service Health
If the mailbox is already in the cloud, the issue might be related to restrictive quarantine policies or a temporary Microsoft 365 service outage.
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Frequently Asked Questions
Why do I get a 'Failed to load data' error in my quarantine portal?
This error typically occurs in hybrid environments when your email mailbox is still hosted on-premises rather than in Exchange Online, which prevents the modern Microsoft 365 Defender portal from properly loading your quarantine data.
Can non-global administrators fix the quarantine loading error?
Non-global administrators generally cannot fix this directly if it requires mailbox migration. An IT administrator with Exchange migration privileges must move the on-premises mailbox to the cloud or adjust the global quarantine policies.
How long does it take for quarantine access to work after migrating to the cloud?
Once the mailbox migration to Exchange Online is successfully completed and Azure AD syncs the changes, quarantine access should typically be available within 1 to 2 hours.
Are there other reasons quarantined emails won't load for cloud users?
Yes, if the mailbox is already in the cloud, the error could be caused by restrictive quarantine policies preventing user access, missing permissions, or a temporary Microsoft 365 service outage affecting the Defender portal.
