Hi sahmsmh,
This issue is usually caused due to account sync issues. I would like to know some information about this issue so that we could assist you further.
1. Were you able to add the account successfully?
2. Do you get any error code or error message?
I would suggest you to try the following methods and check if it works for you.
Method 1:
Try the steps in the following Microsoft Help article and check if it helps.
http://windows.microsoft.com/en-us/windows-8/what-troubleshoot-problems-app
Method 2:
Try removing and re-adding the email account and check if the issue persists.
Refer to the following Microsoft Help article to remove and re-add the email account in Mail app.
http://windows.microsoft.com/en-us/windows-8/add-accounts
Note: Refer to the section "Remove an Account" first and then refer "Setup Mail app and add contacts".
Please reply with the status of the issue so that we can help you better.