The easa-share folder contains the configuration of Databases and Emails. It must be shared to grant a remote SYSTEM account access to those settings (the account that is running tomcat on the remote server with JSF, Excel or EASA Web Service).
EASAP Servers, Excel Servers and EASA Web Service Servers will need remote access to the easa-share folder located on the main EASA Server. Remote Compute Servers don't require access and as a result environments where all remote servers are Compute Servers do not need this configuration.
During installation time, EASA asks for the network path to easa-share in a host name or IP address format.
Use the hostname instead of IP address if possible.