The Microsoft 365 operated by 21Vianet technical support team troubleshoots only those issues that are related to Microsoft 365 operated by 21Vianet. Incorrect system time can break your connection to Microsoft’s authentication servers. Always enable Set time automatically and select the correct region in your Windows settings. If all else fails, uninstall Microsoft 365 completely, remove remaining registry traces using the Office Uninstall Support Tool, and reinstall it fresh.

Advanced Fixes for Office 365 Enterprise Users

With every subscription of Microsoft 365 operated by 21Vianet, 21Vianet support credential loop in Microsoft 365 provides technical, presales, billing, and subscription support. Have your Microsoft 365 apps suddenly started crashing after a recent Windows or Office update? Many users experience random application freezes, launch errors, and constant crashes after installing new patches or cumulative updates. Assistance for billing and subscription management issues is available online or by telephone during China business hours (Beijing Time), Monday through Friday. Billing and subscription management support can be accessed using the same phone number and online service request process as with technical support.

Additional Tips to Prevent Future Crashes

We can help you find a solution or connect you to technical support. This restores missing or corrupted Office components that affect search indexing. If a Microsoft 365 application such as Word or Excel isn't working correctly, sometimes restarting it will fix the problem. Download the tool from Microsoft and run the Outlook diagnostic to auto-detect server and account issues. This ensures that the system-wide search index service is active and linked to Office 365 apps.

What are the benefits of paid support compared to the support included with the subscription?

You must be an admin for a business subscription to use these support methods. Explore learning tools to collaborate on projects together and independently, all in one place. Create equitable learning environments that help students develop knowledge with familiar apps essential to both academic and future career success. If login issues are still persisting, our experts can assist you live via WhatsApp.

???? Common Causes of Office 365 Search Not Working

Then, navigate to File → Options → Add-ins, and disable all non-Microsoft add-ins. If your country/region isn’t guide to Office 365 sign-in errors listed, select a neighboring country/region or dial the United States support phone number. For a smoother support experience, we recommend that you open separate support requests for each issue. You must have at least one subscription bought through Microsoft to access Microsoft support.

Step 2 – Update Outlook and Office 365

• If you’re a volume licensing admin but are unable to access the admin center, you can create an online support request.
• We’ll walk you through step-by-step solutions for Office, Outlook, or Teams sign-in errors.
• Following the steps above should restore your search functionality quickly.
• Microsoft 365 crashes after updates can be frustrating, but these fixes will restore stability quickly.
• With Microsoft 365, you can designate several types of administrators who serve different functions.
• Outlook and Office 365 sync issues can be frustrating but are almost always fixable.
• The problem usually occurs due to authentication token mismatches, cached credentials, or browser session conflicts.

The support telephone number can be found on the Microsoft 365 operated by 21Vianet portal. 2 Severity A is only available to customers who signed an advanced online service agreement with 21Vianet through a sales account manager. Download and run the official Microsoft Support and Recovery Assistant (SaRA). It automatically diagnoses and repairs many Office 365 problems — including search indexing and sync issues.



In this guide, you’ll learn how to fix Office 365 search not working after update using step-by-step methods verified to restore indexing and search functionality. Whether it’s Outlook, Word, or Excel, these fixes ensure your data is re-indexed, searchable, and synced properly. For more self-help resources, see Microsoft 365 operated by 21Vianet.



This process replaces damaged core files without removing your data or customizations. 21Vianet also expect customer to collaborate at reasonable level accordingly. 21Vianet assigns a severity level to a case when it’s opened, based on an assessment of the issue type and customer impact. Examples of issue types and severity levels are shown in the following table. Authorized administrators can repair corrupted OST in Outlook use the Microsoft 365 operated by 21Vianet portal to submit service requests online and access support telephone numbers.