Here are some steps that you can do to resolve Outlook issues connecting to the Exchange server:

1. Check the server address and port settings in the email account settings
2. Verify that the internet connection is active and working properly
3. Test the email account by sending/receiving with other programs or services
4. Reset Outlook authentication and credentials
5. Ensure the account is not blocked or locked out
6. Restart Outlook, and try the email again