Rewrite rule error: HTTP Error 500.50 - URL Rewrite Module Error. The expression “https://abc.com/{R:1}” cannot be expanded

Question

Whenever someone makes request over HTTP protocol I rewrite the url to make it HTTPS. This is the code in web.config:

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Answer 1

The matches are zero based.

Won't work because you only have one match. You need:

Also, this won't work, because you can only match on the path below the site root.

It looks like you are checking for ssl. Try this instead: