If you've been given a link to unionbanka-my.sharepoint.com, you're likely looking at a SharePoint portal set up by Union Banka for sharing documents or forms. It's not a standalone website it's a Microsoft-hosted service that requires you to log in through Microsoft's official login page. That redirect to login.microsoftonline.com is a good sign it means the site is using proper Azure AD authentication, not a fake login form.
For a banking portal, security basics are handled well: the connection is encrypted, the certificate is valid, and there's no history of blacklisting. The main thing to watch is how you got the link. If it came directly from your bank's official communication or customer portal, this is likely the right place. If it arrived unsolicited in an email, double-check by calling your bank before entering any credentials. The lack of a Trustpilot profile or web archive history is normal here this is a private access point, not a public business listing. So is unionbanka-my.sharepoint.com safe? The technical signals say yes, but always verify the source of the link when dealing with financial logins.