ERR_SSL_KEY_USAGE_INCOMPATIBLE

[AlexLeadingEdge]

Hi guys,

I'm trying to change my notification email provider to Microsoft 365, but when I log into Microsoft 365 I get the error ERR_SSL_KEY_USAGE_INCOMPATIBLE

ChatGPT tells me it is because the self-signed certificate that VeeamONE version 12.3.0.4670 is using doesn't have "DigitalSignature".

Your cert’s Key Usage is:

DataEncipherment, KeyEncipherment

Missing DigitalSignature

Modern TLS (especially TLS 1.2/1.3 in browsers) expects the server cert to be permitted for Digital Signature (for the handshake). Without it, Chrome throws ERR_SSL_KEY_USAGE_INCOMPATIBLE even though EKU says “Server Authentication”.

So the fix is: replace the certificate with one that includes DigitalSignature (and usually KeyEncipherment), then rebind port 1239.

Is there a way to update / upgrade the certificate?

[AlexLeadingEdge]

Nevermind, I've managed to figure out how to delete and re-add the certificate.

[jorgedlcruz]

Glad to hear everything is working, Alex, did you use any of our public articles? Maybe if you share it it can help someone in the future.

Thank you