Recipients of the same message who have already followed the instructions in it should change their email account's password immediately before their accounts are hijacked and used fraudulently.
The "Microsoft Mailbox Storage Warning" Phishing Scam
From: Account verification team <email@example.com>
Sent: Monday, April 30, 2018 8:09 AM
To: Account verification team
Subject: Mailbox Storage Warning
This is to inform you that your account has reached the upgrade stage, due to you're using the old version of Microsoft. Take a minute to configure your account for a faster, safer and full-featured Microsoft account experience.
Your account will be closed in the next 48 hours if not configured to the new version.
Click here to configure your account
Microsoft Customer Support.
Copyright 2018 Inc
The link in the fake email message goes to a fake Microsoft Outlook, Hotmail or Live website. On the fake website, visitors will be asked to sign-in, if they attempt to do so, their email usernames and passwords will be sent to the cybercriminals responsible for the phishing email message. Once the cybercriminals have gotten their potential victims Microsoft account credentials, they will gain access to their accounts, hijack the accounts by changing passwords, and use the accounts fraudulently.
Remember, always go directly to your Microsoft mailbox by going to www.hotmail.com, www.outlook.com or, www.live.com verify if your mailbox is full, instead of clicking on a link in an email message. And, for those users whose accounts have already been hijacked, they can click here for help recovering their accounts.