If the issue persists, repeat the process and choose Online Repair. This process replaces damaged core files without removing your data or customizations. 21Vianet also expect customer to collaborate at reasonable level accordingly.

⃣ Reset Browser Cookies & Cache

21Vianet understands that receiving timely technical support from qualified professionals is a key aspect of cloud services. Equally important is the critical role that the customer’s IT department plays in the support of its users. 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.

Microsoft 365 Apps Crashing After Update — Step-by-Step Repair Guide

• Have your Microsoft 365 apps suddenly started crashing after a recent Windows or Office update?
• Go to Control Panel → Programs and Features, select Microsoft 365, and click Change → Quick Repair.
• The administrator is expected to provide initial assistance for the customer’s users.
• Alternatively, generate an app-specific password if using Outlook 2016 or older.
• Incorrect system time can break your connection to Microsoft’s authentication servers.
• We’ll walk you through step-by-step solutions for Office, Outlook, or Teams sign-in errors.
• Billing and subscription management support can be accessed using the same phone number and online service request process as with technical support.
• Explore learning tools to collaborate on projects together and independently, all in one place.

Follow each method step-by-step to ensure smooth performance and protect your work data. Stay tuned on FixTechGuide.com for more troubleshooting guides and expert fixes. The flush DNS and re-sync Outlook type of support Microsoft provides for consumers depends on the product you’re calling about and if you have a product for home or for business use. Anyone in your organization can quickly create documents, presentations, and worksheets within a single, unified app experience. Microsoft 365 Basic now comes with 100GB of cloud storage, secure photo and file storage, secure ad-free email, and technical support. The administrator is expected to provide initial assistance for the customer’s users.

? Fix Office 365 Login Issues on Mobile

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 use the Microsoft 365 operated FixTechGuide support for Office 365 by 21Vianet portal to submit service requests online and access support telephone numbers.

Step 2 – Update Outlook and Office 365

Go to Settings → Windows Update and install all pending updates. Then open any Office app → File → Account → Update Options → Update Now to ensure both are synchronized. Go reset cached Exchange mode to Control Panel → Programs and Features, select Microsoft 365, and click Change → Quick Repair.





Microsoft 365 with Microsoft Teams helps deliver a complete, secure solution to help everyone work better, smarter, and more cohesively. Microsoft Create has professionally designed, fully customizable templates to help you get things done. Find solutions to common problems or get help from a support agent.