I don't like spending my own $$$ on things like certificates, so I was encouraged by LetsEncrypt. I use it on this site to enable SSL.
however, my site has been using an expired cert for a number of months now, not good!
this was due to a WebJob failing in Azure. "Functions.RenewCertificate always fails". whilst I still don't have a long term fix for this, following the advice on this thread, to extract a nupkg contents and rue-load worked.
provided some hints on how to use the kudu console