If you are unable to connect to your email account, here are some things to try.
Check connectivity.
I know it sounds simple, but accessing email is one of the primary ways in which we interact with on the internet. Sometimes we percieve that "Outlook is not working" because our internet connection is down. Open a web browser and browse a few links for a few moments. If the internet is working properly, the continue to troubleshoot your email connection.
Check Devices
Have you tried to access your account too many times with a bad password? If you have been attempting logins to your email account with various passwords, you may have locked your account. If this is the case you will have to wait for 30 minutes until the system resets your account.
If you have recently changed your password in AMS (ams.unt.edu), but have forgotten to change it on all devices (mobile phones, computers, etc.) that access your account, it is possible that one of those devices is locking your account by repetitively attempting access with a bad password. Make sure all devices that access your email account have the same and correct password.
Check to see if your password works properly.
Login to ams.unt.edu. If your password works correctly, then you will want to make sure that all your devices (see above) have the same password entered. If all your devices, do have the same password then continue.
Initiate a password sync.
If you make a change to information in your account in AMS, it will prompt a resyncronization to your Active Directory account. The Active Directory account is the account that you use to login to the UNT network, email, communicator, and other applications. The simplest way to initiate a resync is to change your password. Give the system 15 minutes to replicate the changes throughout all systems before attempting a login.
Check Outlook Connectivity
Check to see if Outlook is connecting to the email server properly. In Windows, the bottom right-hand corner, there is a taskbar icon for Outlook. It looks like a yellow small square with the letter "O" in it. Holding down the CTRL key on your keyboard, "right-click" on the taskbar icon, and from the menu that appears select "Connection Status." This will bring up a status window that will have a list of servers. Under the column named "Status", you should see the word "Established" appear. If you do not see the word "Established", then click the button on that window that reads "Reconnect." If the status does not read "Established", and you are sure that you have internet connectivity to your computer, proceed to the next test.
Checking E-mail AutoConfiguration
Check to see if your Outlook client is properly configured. In Windows, the bottom right-hand corner, there is a taskbar icon for Outlook. It looks like a yellow small square with the letter "O" in it. Holding down the CTRL key on your keyboard, "right-click" on the taskbar icon, and from the menu that appears select "Test E-mail AutoConfiguration." In the window that appears, you will see your email address listed, and the password field will be blank. Enter your password in the field provided, deselect the "Use Guesssmart" and "Use Guessmart Authentication" checkboxes, and click "Test."
If the test fails, use the instructions above to verify your password in AMS, and to initiate a resync of your password in AMS. If the test succeeds and you are not recieving new email. Login to webmail.unt.edu to verify that new mail is making it into your account. If you see new mail in the Webmail viewer, you may need to rebuild your Outlook profile. Contact the UNT Helpdesk at (940)565-2324 for assistance.
Mobile Device: iPhone
If you are trying to configure your iPhone and you cannot verify your account during the setup process, turn off WiFi and Bluetooth. On the iPhone, tap "Settings", then tap "Wi-Fi." Slide the Wi-Fi switch to off. In the upper left corner, tap the "Settings" back arrow to return to the Settings menu, and scroll down to "General." Enter the general settings, and tap "Bluetooth" and slide the switch off. Reattempt the iPhone configuration.
Data can be transferred over Wi-Fi, Bluetooth, and 3G. By restricting data communication to only 3G, you are eliminating network intereference from other possible sources. It may be that the iPhone is failing to configure because it is trying to access your account using the wrong data port.
If your iPhone is still failing to configure your Exchange email account, contact your Network administrator for further assistance.