If you've landed on collab.sn.six-group.net, you're likely trying to access a collaboration tool for SIX Group, the Swiss financial infrastructure company. The site immediately redirects to Microsoft's login page, which is exactly what you'd expect for a corporate portal using Azure Active Directory.
Most established companies use similar setups, so the redirect itself isn't suspicious. The security configuration is actually above average — valid encryption, clickjacking protection, and no malware history. But the site has a few quirks: it blocks all search engine crawlers, has no history in the Wayback Machine, and the subdomain itself doesn't show up in WHOIS. For a company as large as SIX, these are minor oddities that could simply mean this subdomain was recently created.
If you're an employee or business partner, collab.sn.six-group.net reviews from others are unlikely to exist since it's not a public site. The main risk would be phishing, so confirm the URL with your organization before entering credentials. For its intended use, this site appears legitimate, but it pays to be cautious with any login page.