You can setup eWay-CRM, so that it is enabled on the Terminal server only for some users. This guide shows how to disable the add-on for specified users. For the opposite procedure, follow this article.
All versions of eWay-CRM
eWay-CRM will be disabled through Windows Registry for users who should not work with it.
Create DWORD LoadBehavior with 0 value for users you do not want them to use eWay-CRM. The value should be created on the following path: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\Outlook\Addins\eWayAddin.Connect
You can also download and run this file. It will set that current Windows user cannot use eWay-CRM.