How to Fix Microsoft 365 PST Import Stuck at 68% Quarantined
Question details
The user needs to resolve a Microsoft 365 PST import job that has halted and been marked as quarantined.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Migrating email data via a PST import job within the Microsoft 365 environment.
- Observed behavior
- The PST import job remains stuck at 68 percent, waiting for job pickup. The import report states it was quarantined because Azure.Core could not be loaded due to an assembly manifest version mismatch.
Ensure you have Microsoft 365 Global Administrator or Exchange Administrator privileges and have your detailed import report ready before attempting to resolve service-side issues.
Contact Microsoft Support for Service-Side Resolution
Since the error points to a backend failure loading the Azure.Core assembly, you must create a service request for Microsoft engineers to unblock the quarantined job.
The error message specifically indicates that the remote import service failed to load a required assembly. Because this represents a service-side failure within Microsoft's infrastructure rather than a user configuration error, additional backend tools and permissions are needed to investigate and clear the quarantine status.
Navigate to the Microsoft 365 admin center at https://admin.microsoft.com and sign in with your administrator credentials.
Locate and select 'Support' from the left-hand navigation menu, then click on 'New service request'.
In the search bar, type a brief description of the issue, such as 'PST import job stuck at 68 percent and quarantined'.
Choose the 'Contact Support' option to open a direct ticket with Microsoft support engineers, providing them with the specifics of the Azure.Core error.
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Frequently Asked Questions
Why does a Microsoft 365 PST import job get quarantined?
A PST import job is quarantined to protect the system when the remote import service encounters a fatal service-side error. In this specific scenario, it occurs because required backend components, like the Azure.Core assembly, fail to load properly.
Can I manually resume a PST import job stuck at 68 percent?
If the job is stuck due to a backend assembly error and flagged as quarantined, you generally cannot resume it manually. Microsoft Support must investigate the backend failure and release the job from quarantine.
Where do I find the import report detailing the Azure.Core error?
You can view the specific error details by navigating to the Data Lifecycle Management section in the Microsoft Purview compliance portal, selecting your import job, and downloading the associated status or failure report.
