Hi @Randi,
When I create a new Outlook account, do I not need a mobile phone number or other email verification? How secure is this account? Will it be stolen or locked?
From your description, are you talking about creating new outlook.com account via [https://outlook.live.com/owa/? If this is the case, you can add an additional security information like email or phone number for the account by sign in to your Advanced security options page using your account.
For more tips about protecting the outlook.com account, you may refer to the following article:
Help protect your Outlook.com email account
Then please understand that actually the "Outlook" and "Outlook Management" tags are designed for questions about Outlook desktop clients for Windows or Mac. If you need further assistance about outlook.com accounts, you can visit the dedicated forum below:
[https://answers.microsoft.com/en-us/outlook_com/forum
If I have misunderstood anything about your question, feel free to let me know.
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