Don't know about a special plugin, but you can simply check the ports 5060 (SIP) and 5061 (SIP-TLS). I did this successfully on Office Communicator (nowadays Lync) servers. <div class="gmail_quote">On Tue, Jan 31, 2012 at 5:15 PM, <<a href="mailto:valle@cimex.com.cu">valle@cimex.com.cu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Everyone, Is there any plugin to check Microsoft Live Communication Service (SIP protocol 5060 TPC/UDP portS)..? Thanks in advance, Valle ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! <a href="http://p.sf.net/sfu/learndevnow-d2d" target="_blank">http://p.sf.net/sfu/learndevnow-d2d</a> _______________________________________________ Nagiosplug-help mailing list <a href="mailto:Nagiosplug-help@lists.sourceforge.net">Nagiosplug-help@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagiosplug-help" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagiosplug-help</a> ::: Please include plugins version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div>