msoid.billit.be looks like it wants to be a Microsoft login page, but the reality is far less safe. The domain redirects visitors to the real office.com, but the SSL certificate it presented doesn't match the site at all, making any connection insecure and unreachable. That mismatch is a classic red flag for phishing attempts designed to intercept credentials before forwarding you to the real site.
Because the site doesn't load properly, there is no way to verify who runs it. The WHOIS data for this subdomain is hidden, and no contact information or legal policies exist. While the domain is hosted on Microsoft's own cloud infrastructure, that doesn't mean Microsoft owns it — anyone can spin up services on Azure. The combination of a misleading name (msoid), a redirect to a trusted brand, and a broken certificate makes this look like a setup for credential theft.
If you're wondering whether msoid.billit.be is a scam, the answer is yes. Don't enter any personal information here, and don't follow the redirect. Stick to visiting office.com directly through your browser's address bar.