When you land on a site that doesn't load, shows a generic error message, and has no branding, contact information, or privacy policy, the first question should be: why does this address exist at all? In the case of auc-excel.wac.trafficmanager.net.wac-0003.wac-dc-msedge.net.wac-0003.wac-msedge.net, the answer appears to be that it's not a real website. It's a technical endpoint within Microsoft's Azure network that lacks a valid SSL certificate, meaning the connection isn't secure and the page won't load properly.
For comparison, any legitimate service running on Microsoft's infrastructure would have a proper domain name, a valid certificate matching that domain, and a working homepage that tells you what the service does. This address has none of those things. The WHOIS record comes back empty, there's no company information, and no history in web archives that we could verify. If you're asking yourself whether auc-excel.wac.trafficmanager.net.wac-0003.wac-dc-msedge.net.wac-0003.wac-msedge.net is a scam or fake, the more accurate question is whether it's anything at all. All evidence points to an abandoned or misconfigured endpoint that shouldn't be used for anything. Skip it.