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How to Report an Expired TLS Certificate for *.bdec.microsoft.com

Rana Garcia Oct 1, 2026 869 views

Question details

The user needs to find the proper channel to report and investigate an expired TLS certificate associated with the bdec.microsoft.com domain.

How to Report an Expired TLS Certificate for *.bdec.microsoft.com

Product: Microsoft Services
Device & OS: not provided
Scenario: Encountering system or connection errors caused by an expired TLS certificate on a Microsoft backend domain.
Observed behavior: Connections to endpoints under *.bdec.microsoft.com are failing or triggering security warnings because the server's TLS certificate has passed its expiration date.

Before you start

Gather the specific certificate name, all affected endpoint URLs, and the exact error codes you are receiving. Do not bypass or disable certificate validation under any circumstances, as this will expose your system to severe security risks.

Solution 1Recommended

Report the Expired Certificate to Microsoft Support

Because the affected domain is managed by Microsoft, their internal service teams must investigate and deploy the renewed certificate. Client-side fixes are not possible.

An expired TLS certificate on a Microsoft-owned infrastructure domain like bdec.microsoft.com cannot be resolved by end users or external administrators. The only secure and effective approach is to escalate the issue to Microsoft's service engineers so they can update the certificate on their servers.

Document the Certificate Details

Extract the specific details from your error logs, including the certificate thumbprint, the exact expiration date, and the specific *.bdec.microsoft.com endpoint that is failing.

Access the Microsoft Q&A Forum

Open your web browser and navigate to the official Microsoft Q&A platform. Select the tags for 'Office' and 'Exchange hybrid management' to ensure your post reaches the correct specialists.

Submit the Investigation Request

Create a new detailed post. Paste the certificate details and endpoint URLs you gathered earlier, explaining how the expired certificate is impacting your hybrid environment or service connectivity.

Open a Support Ticket (For Admins)

If you have administrative access, log into the Microsoft 365 Admin Center, navigate to the Support menu, and open a direct service request detailing the expired TLS certificate issue.

Report the Expired Certificate to Microsoft Support

Important Security Notice: Never implement temporary workarounds that bypass TLS validation. Disabling security checks leaves your network vulnerable to interception and unauthorized access.

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Frequently Asked Questions

What is the bdec.microsoft.com domain used for?

This domain is typically utilized by Microsoft's backend infrastructure. It is often associated with telemetry, diagnostic data routing, or specific functions within Microsoft Office and Exchange hybrid environments.

Can I manually renew or fix this TLS certificate?

No. The domain is owned and controlled by Microsoft. Only Microsoft's internal infrastructure and security teams hold the private keys necessary to generate and install a valid replacement TLS certificate on those servers.

Is it safe to ignore the expired certificate warning temporarily?

It is highly discouraged to ignore or bypass TLS certificate warnings. Doing so disables vital encryption and server authentication checks, leaving your data vulnerable to man-in-the-middle (MitM) attacks.

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