If you've landed on tph1.sharepoint.com and been asked to log in with a Microsoft account, you're right to be cautious. While the site uses Microsoft's own infrastructure (valid SSL, clean blacklist status), the domain itself raises several red flags that a legitimate SharePoint tenant wouldn't show.
The biggest issue is that the person or company behind this domain is completely anonymous. WHOIS records return no match, meaning the registrant has chosen to hide their identity entirely. For a site that handles login credentials, that's a serious warning sign. Most legitimate SharePoint tenants either reveal basic ownership details or are tied to a known organization.
On top of that, the site has no history in the Wayback Machine, no Trustpilot presence, and no visible legal pages like a privacy policy or terms of service. The homepage doesn't even show content — it immediately redirects to a Microsoft login page with a long, complex URL. While it's possible this is a real SharePoint site for a new or internal organization, the combination of hidden ownership, zero public footprint, and a redirect that could be mimicked by attackers means you should verify the domain through official channels before entering any credentials. To check if tph1.sharepoint.com is a scam or legitimate, your safest move is to contact the organization that supposedly owns this tenant directly.
For now, the data says exercise serious caution. Don't assume this is safe just because it looks like a Microsoft login.