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Office OS X Anti-Piracy Monitor
Port 2223 is associated with the Microsoft Office OS X anti-piracy network monitor, a service primarily used by specific versions of Microsoft Office for Mac to detect unlicensed usage or installations. It generally communicates via UDP and is unofficially assigned for this function. The port facilitates internal messaging and license verification processes to uphold Microsoft’s software licensing terms..
Port 2223 has been historically linked to the Microsoft Office OS X anti-piracy network monitor, a background service used on Mac systems equipped with certain versions of Microsoft Office. Its main purpose is to help identify illegal installations and unauthorized use of software. The monitor typically communicates over the local network or with external validation servers, exchanging status and license information.
Communication on this port usually uses UDP for lightweight, fast transmission of license check signals. Since this is an unofficially assigned port, it does not follow a specific protocol standard and might rely on proprietary messaging formats tailored by Microsoft. Because of this, documentation is sparse, and network activity on this port is often observed internally without detailed external visibility.
Deployment of this service is usually limited to older Microsoft Office installations on Mac OS X. Modern licensing techniques have largely obviated its use, shifting towards activation servers and cloud-based validation systems instead. As such, this port's relevance has significantly declined but could still be encountered in legacy environments.