In order to support the following extensions 's support: - xls, doc, ppt, xlsx, docx, pptx . It is necessary installed Libre OFFICE - the "LibreOffice" software must be implemented on the application server that hosts your JIRA instance.
Install Libre Office LibreOffice from Libre Office
Use the system package manager to install it. The package manager varies from distro to distro.
Define OFFICE_HOME in the environment pointing to an existing Libre Office LibreOffice home install.
Control Panel -> System and Security -> System Properties -> Advanced -> Environment Variables