You might have come across autodiscover.jacobs.com while setting up email on your phone or computer. That's exactly what it's for: it's the autodiscover service that helps Outlook and other clients configure your Jacobs email account automatically. Because it's a subdomain of jacobs.com, a Fortune 500 engineering company, the site is backed by a real business with a long history.
From a technical standpoint, the site checks out. It uses modern encryption, enforces secure connections, and has protections against common web attacks. There are no scam reports, no blacklists, and the site has been online for at least a couple of months. Privacy and terms pages are present, which is a good sign even for a service endpoint.
What should you watch for? Since this is a corporate service, you wouldn't normally visit it in a browser. If you're manually entering server settings, make sure you're using the correct domain (autodiscover.jacobs.com) and not a lookalike. That's the main thing. Otherwise, there's no reason to doubt the legitimacy of this site. Is autodiscover.jacobs.com a scam? No, it's a standard part of Jacobs' email infrastructure.