.OPAX File Extension
File TypeMicrosoft Office User Settings File
What is an OPAX file?
Holds language neutral resources used by the Office Customization Tool (OCT) to create a custom installation of Microsoft Office; contains user created default settings including default font, font-size, and caching options;
.OPAL is the language specific counterpart to the OPAX file. These two files are used by OCT to create .MSP setup files that will be used to install the customized Microsoft Office.