Accessing email in Outlook

Hello,

I am the owner of the business.  I hired an office manager, and she set up outlook with herself as the admin and me as a user.  Long story short, she got fired.  I did get access to her account (mailto:Email address removed) and changed it to mailto:Email address removed and also changed the password when she was terminated. 

However, I'm needing to check what's in her email box, as I'm pretty sure it's still receiving messages I need to see.  I added her email address to my Outlook, but it's still showing up as mailto:Email address removed and does not show me any emails.  I am new and not familiar with using Outlook and am struggling to troubleshoot this. 

I can be reached by phone at the office at 361-364-4551 if needed, and I do have access to my email, Email address removed

Thank you for any help!