n order for Liferay Sync to function properly, the application will need access to the Liferay Portal. In many environments, this is a straightforward connection. In some, however, the local firewall may result in the inability for Liferay Sync to work with the portal.
Resolution
If the firewall is causing the issue, the following URLs will need to be allowed through the firewall in order for Liferay Sync to be able to access the portal:
/c/document_library/find_folder /c/document_library/find_file_entry /api/secure/jsonws /api/secure/webdav /so-portlet/api/secure/jsonws (if Social Office is installed)