UCCAPILOG - Microsoft UCC API Log File is another file extension that is good for log files which are designed by Microsoft applications which use UCCAPI. They also contain information that has to do with logs and perofmances. They can also be changed and new program executions can be added as well. There are developers that come along with this extension as well that can benefit you one way or the other. They are mainly found on tracing folder under the home folder of a user. There are also common programs that use these types of files. You must remember that you should have this file in order to take advantage of the extension.