You have clicked on a link that may have taken you to a fake website designed to look like a legitimate Microsoft sign-in page. 

You were prompted to enter your credentials, which may have been captured by an attacker.

 These stolen credentials could potentially be replayed by the attacker to access your Microsoft services and other resources associated with your account. 

If you entered your username or password, treat your credentials as compromised and report the incident immediately so that appropriate security measures can be taken to protect your account and company data.