The .uccapilog file extension is used by the Windows Live Messenger IM application. The Windows Live Messenger program is a Unified Communications application. Using this application, a user can make audio and video calls from his or her computer as well as computer-to-phone contact and phone-to-phone communications.
Files that contain the .uccapilog file extension contain the UCC API log files that are created by the Messenger application. These logs contain information about the troubleshooting and debugging that the UCCAPI application has performed. As new troubleshooting and debugging tasks are performed by the application, new information is added to the bottom of the file.
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