I am still seeing this behavior in 5.0.11 the sync.log is below.
2009-01-21 10:32:06,264 INFO [btpool0-5918] [] sync - OPTIONS Microsoft-Server-ActiveSync?null
2009-01-21 10:32:06,266 INFO [btpool0-5918] [] sync - HTTP/1.1 200 OK
2009-01-21 10:32:11,983 INFO [btpool0-5914] [] sync - POST Microsoft-Server-ActiveSync?User=klinet&DeviceId=Applxxxxxxxx&Devic eType=iPhone&Cmd=Provision
2009-01-21 10:32:11,985 INFO [btpool0-5914] [name=klinet;mid=7;DeviceId=Applxxxxxxxx;DeviceType =iPhone;SyncCmd=Provision;] sync - Invalid or unsupported command Provision
com.zimbra.zimbrasync.UnsupportedCommandException: Provision
at com.zimbra.zimbrasync.ZimbraSyncServlet.processCom mand(ZimbraSyncServlet.java:396)
at com.zimbra.zimbrasync.ZimbraSyncServlet.processPos tRequest(ZimbraSyncServlet.java:339)
at com.zimbra.zimbrasync.ZimbraSyncServlet.doPost(Zim braSyncServlet.java:241)
at com.zimbra.zimbrasync.ZimbraSync$HttpHandler.doPos t(ZimbraSync.java:33)
at com.zimbra.cs.extension.ExtensionDispatcherServlet .service(ExtensionDispatcherServlet.java:101)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1093)
at org.mortbay.servlet.UserAgentFilter.doFilter(UserA gentFilter.java:81)
at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter .java:132)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:716)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:406)
at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:211)
at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.handler.rewrite.RewriteHandler.h andle(RewriteHandler.java:350)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:205)
at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:442)
2009-01-21 10:32:11,985 INFO [btpool0-5914] [name=klinet;mid=7;DeviceId=Applxxxxxxxx;DeviceType =iPhone;SyncCmd=Provision;] sync - HTTP/1.1 400 Invalid ZimbraSync command  |