Hi @Elizabeth Ordaz,
Thank you for posting your question in the Microsoft Q&A forum.
To better assist you, could you please provide a few details about the situation?
1/ What type of business email account are you using? (e.g., Microsoft 365, Exchange, or another provider)
2/ How are you trying to access your email? (Web browser, Outlook desktop app or Outlook mobile app)
3/ What happens when you attempt to sign in? Can you provide any error messages or a screenshot for us to better understanding the issue?
4/ Have you recently changed your password or updated security settings?
5/ Is this issue affecting only you or other users in your organization?
Once we have this information, we can guide you through the next steps.
I'm looking forward to your response.