Hi Qureshi,
we have tested from RDP and below is the eventvwr log.
The description for Event ID 110 from source Microsoft Dynamics AX cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
Unable to connect to an Application Object Server. A company name or server name may not be specified correctly in the client configuration, or the server specified may not be available.
BUt where as all other users are able to connect to the application. only for this user it is throwing the above error.