[joekrill]

> Monitoring the server logs showed that Bingbot only crawled the lowercase version of the URL.

I've always thought it was much more common that sites written in ASP.Net have case-sensitive URLs. At least that was quite common ~5 years ago (was it a default setting or something? I haven't done .Net stuff in a while). So it's pretty crazy that Bing only crawls lowercased URLs.

[gowld]

That's overstating the "case" (pun!). Ignoring or normalizing case is different from ignoring a non-redundant URL with uppercase.

But it might cause problems if the IIS server isn't properly case-preserving to normalize back to the standard (possibly capitalized) form.

Mac filesystem was nicely case-preserving but case-agnostic in this way, going back decades.

[saagarjha]

It’s still like this by default, which can cause issues when working with folders created on other platforms.

[lgats]

I've found bing explicitly requesting lower-case versions of my urls despite mixed case being submitted in the sitemap.

Now I either 301 redirect to the proper-case url or ensure I have canonical tags set up.