Outlook doesn't support connections to Exchange by using ActiveSync and error: Log onto Exchange ActiveSync mail server (EAS)
Original KB number: 2859522
When you configure Microsoft Outlook to connect to Microsoft Exchange by using the Exchange ActiveSync (EAS) protocol, you receive the following error message:
Log onto Exchange ActiveSync mail server (EAS): The server cannot be found.
This problem occurs because Outlook doesn't support connections to a server that's running Exchange Server by using the EAS protocol.
To resolve this problem, connect to Exchange by using the standard Exchange connection settings. For more information about how to configure Outlook to connect to Exchange, see Add an email account to Outlook.
The EAS protocol provides access to data in Exchange mailboxes to various devices and other clients. Outlook supports the use of EAS to connect to other services that support the EAS protocol. Because an EAS connection doesn't provide all the features of a standard connection to Exchange, Outlook doesn't support this method to connect to Exchange.