Where to send (escalation contacts)

Hi @Md Shariful Islam,

Welcome to the Microsoft Q&A forum.

I apologize for any inconvenience this issue may have caused you.

As you mentioned, you have already contacted Microsoft Technical Support and are currently being assisted directly by a support engineer. In this case, you can email the engineer who is handling your case to request that your issue be escalated, and also ask them to provide clearer explanations regarding the related details of the incident.

I understand that being asked to contact the current engineer again may make you feel uncomfortable. I hope you can understand that this is a community forum where users share and exchange information with one another. Here, moderators are unable to directly escalate your issue or provide detailed information about the working process between you and the support engineer.

If the engineer who is currently assisting you does not respond, I recommend that you create a new support ticket to report the issue again. At the same time, you can request the new support engineer to escalate your case to a higher-level team.

 If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

I look forward to continuing the conversation.

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For a critical, tenant-wide OneDrive and SharePoint storage issue that has not been resolved through initial support contacts, the next step is to escalate through official Microsoft support channels so that backend logs can be reviewed and the case can be handed to a higher-tier engineer.

Use the following escalation paths depending on role and subscription:

1. If there is a Microsoft 365 admin for the tenant
   • Go to the Microsoft 365 admin center.
   • Open Support → Help & support.
   • Describe the issue (OneDrive Plan 2 downgraded, incorrect SharePoint storage, impact, prior case number) and submit.
   • In the support pane, use the option to Contact Support and explicitly request escalation due to critical business impact and prior unsuccessful sessions.
   • If the issue is blocking business operations, classify it with the highest appropriate severity when prompted so that response time and escalation align with a critical-impact case.
2. If the environment is part of a partner-managed or CSP tenant
   • The partner’s Helpdesk agent or Admin agent should escalate via Partner Center using the commercial/technical support options documented for CSP partners. This routes the case to Microsoft with partner-level escalation paths available.
3. If the environment is Dynamics 365 Business Central–related (for example, storage surfaced via Business Central)
   • From the Business Central administration center, select the affected environment, then Support → New Support Request.
   • This opens a case in the Power Platform Admin Center with tenant information pre-populated.
   • Provide detailed description, impact, and reference any existing case numbers so the new request can be linked and escalated.
4. For OneDrive-specific admin escalation
   • Admins can also use the dedicated OneDrive admin help resources and Microsoft 365 for business support to open or escalate a ticket, ensuring that the case is clearly marked as affecting OneDrive storage quotas and SharePoint storage reporting.

When submitting or updating the case, include:

• Exact symptoms (OneDrive Plan 2 reduced from 5 TB to 1 TB, SharePoint storage showing zero/incorrect values).
• Timeline (when the support session occurred and when the downgrade was observed).
• All troubleshooting already performed (license reassignments, PowerShell steps, waiting for backend sync) and that the issue persists beyond expected propagation time.
• Business impact (number of users affected, blocked operations, risk to data access).
• Request explicit escalation to a senior engineer and a review of backend configuration/quotas for OneDrive and SharePoint.

If the case is already open, reply within the existing support request (portal or email) summarizing the above and explicitly asking for escalation to the next support tier due to unresolved critical impact.

References:

• Overview of OneDrive in Microsoft 365
• OneDrive issues with BT Web Protect
• Customer service problems or report vulnerabilities to escalate to Microsoft
• Escalate Support Issues to Microsoft
• Support for Microsoft Power Platform and Dynamics 365 apps
• Common issues syncing Microsoft SharePoint lists offline
• Microsoft Advertising support team