Exchange 2013 Troubleshootiong: 404 Error when accessing the Exchange Admin Center(EAC)
Scenario
Exchange 2013 CAS role installs perfectly. After a reboot when you open the Exchange Admin Center, you are presented with the login screen, however, once you enter in your admin account details you receive the HTTP 404 error as shown below
https://collaborationpro.com/wp-content/uploads/2016/09/404-300x167.jpg
Solution
The reason is that no Exchange 2013 Mailbox role is installed. Once you install a mailbox server you will be able to access the Exchange Admin Center.