When you land on 188522-ipv4fdsmte.gr.global.aa-rt.sharepoint.com, you get an error message and nothing else. This SharePoint subdomain looks like it was meant for internal use or administrative tasks — it's not a functioning public website.
For a legitimate Microsoft-hosted service, you'd expect at least a login page or a clear description. Instead, the site has no contact details, no privacy policy, and no record in the Wayback Machine. While the technical setup is secure (valid SSL, Microsoft hosting), the total absence of any visible content or identity is highly unusual.
If you came across this link expecting a real service, don't engage. There's nothing here to use, and no way to know if someone is using it for a purpose you wouldn't want to be part of. The safest move is to ignore the URL entirely.