What is the "SSLFailure Inner exception" exception and "The protection service is unavailable" error message when labelling in MIP SDK?

Question

Hi, I'm making an example of applying labels and protections to files via MIP SDK with C#. While I was making an example, I got an "SSLFailure Inner exception" and an "The protection service is unavailable" error message. I need an description for this error message.

Answer 1

@정용우 - Thanks for the question and using MS Q&A forum.

The errors you’re encountering with the Microsoft Information Protection (MIP) SDK can be quite frustrating. Here’s a breakdown of what these error messages typically mean and some steps you can take to resolve them:

“SSLFailure Inner exception”:

This error usually indicates a problem with the SSL/TLS connection between your application and the MIP service. Here are some common causes and solutions:

• Ensure that the SSL certificates on your client machine are up to date and trusted. Sometimes, expired or untrusted certificates can cause SSL failures.
• The application may be trying to use an outdated version of the TLS protocol that is not supported by the server. Ensure that your application is configured to use TLS 1.2 or higher, as older versions are often disabled for security reasons.
• There may be network-related issues preventing your application from reaching the protection service, such as firewall settings or proxy configurations.
• Enable detailed logging in your application to capture more information about the SSL failure. This can help pinpoint the exact cause of the issue.

“The protection service is unavailable”:
This error indicates that the MIP protection service is not reachable. Here are some steps to troubleshoot this issue:

• Ensure that your application is correctly configured to connect to the MIP service. This includes verifying the endpoint URLs and ensuring that your application has the necessary permissions to access the service.
• If your application is not properly authenticated, it may not be able to access the protection service. Ensure that you are using valid credentials and that your application is registered correctly in Azure AD.
• Implement retry logic in your application to handle transient errors. Sometimes, the service might be temporarily unavailable, and a retry can resolve the issue.
• Ensure that your application has a stable internet connection and can reach the MIP service endpoints. Network issues can sometimes cause this error.

For more details refer to this MS documentation: Microsoft Information Protection SDK documentation

Hope this helps. Do let us know if you have any further queries.

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