If you've come across onecognizant.cognizant.com and wondered whether it's a scam, the short answer is: it's not. This is an internal employee portal operated by Cognizant, a major global IT services company. The site doesn't serve the general public. Instead, it redirects to a Zscaler Private Access authentication page — a common setup for corporate remote access. Because it's not designed for outside visitors, you'll see a "could not reach site" error unless you're on the company network or using their ZPA client.
For Cognizant employees, this is the legitimate entry point for work-related resources. The domain has 12 years of web archive history, a valid SSL certificate, and a spotless reputation across blacklists and threat databases. The missing favicon and lack of a privacy policy are irrelevant for an internal tool. If you're not an employee, there's nothing to interact with here. So is onecognizant.cognizant.com safe? Yes, but only within the corporate context it was built for.