Hi expert, I am getting this error "unexpected error. Verify the certificate ID and check that it has not expired" ,when try to connect Machine-to-machine authentication by Visual Studio Code for SDF, but then i tested in postman this is working

This should be in #C42JX79UZ channel. Where are you getting the certificate ID from?

from OAuth 2.0 Client Credentials Setup

Try creating a new certificate with this command and upload it.

openssl req -new -x509 -newkey rsa:4096 -keyout private.pem -sigopt rsa_padding_mode:pss -sha256 -sigopt rsa_pss_saltlen:64 -out public.pem -nodes -days 800