So I don't know the model of the phone off the top of my head, but I know that it runs Windows mobile...

It seems to work ok, but I get a failed sync message on the phone/computer through active sync, and this shows up in the logs. We'd be ok except that it seems to want to sync everything every time... and sucks batteries dry pretty quickly...

Code:
2007-04-27 12:45:04,183 INFO  [http-443-Processor90] [mid=19;name=user@domain;DeviceId=91F1690BB4252738EC6F10666BAD1A8B;DeviceType=SmartPhone;SyncCmd=Sync;class=Email;folder=2;] sync - HTTP/1.1 200 OK
2007-04-27 12:45:07,334 INFO  [http-443-Processor90] [] sync - POST Microsoft-Server-ActiveSync?User=user@domain&DeviceId=91F1690BB4252738EC6F10666BAD1A8B&DeviceType=SmartPhone&Cmd=Sync
2007-04-27 12:45:07,465 WARN  [http-443-Processor90] [mid=19;name=user@domain;DeviceId=91F1690BB4252738EC6F10666BAD1A8B;DeviceType=SmartPhone;SyncCmd=Sync;class=Tasks;] sync - 
000000:  03 01 6A 00 45 5C 4F 50 03 54 61 73 6B 73 00 01  4B 03 7B 32 36 31 42 45 34 44 37 2D 32 43 46 46 
000020:  2D 33 37 32 43 2D 38 35 46 44 2D 44 45 43 31 35  38 38 31 44 37 37 43 7D 31 00 01 52 03 31 35 00 
000040:  01 1E 13 55 03 31 30 30 00 01 57 59 03 34 00 01  5A 03 34 00 01 5B 03 31 00 01 01 56 47 4C 03 33 
000060:  32 32 31 32 32 35 34 38 31 00 01 5D*00 09 05 4A  03 30 00 01 4E 03 31 00 01 5D 03 30 00 01 60 03 
000080:  31 20 73 65 72 76 69 6E 67 20 62 6F 77 6C 20 69  6E 20 42 6F 73 74 6F 6E 00 01 01 01 00 00 47 4C 
0000a0:  03 33 32 32 31 32 32 35 34 37 37 00 01 5D 00 09  05 4A 03 30 00 01 4E 03 31 00 01 5D 03 30 00 01 
0000c0:  60 03 31 20 73 65 72 76 69 6E 67 20 70 6C 61 74  74 65 72 20 69 6E 20 42 6F 73 74 6F 6E 00 01 01 
0000e0:  01 00 00 47 4C 03 33 32 32 31 32 32 35 34 38 35  00 01 5D 00 09 05 4A 03 30 00 01 4E 03 31 00 01 
000100:  5D 03 30 00 01 60 03 33 20 70 69 6E 65 20 62 6F  75 67 68 20 73 61 6C 61 64 20 70 6C 61 74 65 73 
000120:  20 69 6E 20 54 65 6E 6E 65 73 73 65 65 20 00 01  01 01 00 00 47 4C 03 33 32 32 31 32 32 35 34 38 
000140:  33 00 01 5D 00 09 05 4A 03 30 00 01 4E 03 31 00  01 5D 03 30 00 01 60 03 34 20 65 75 63 61 6C 79 
000160:  70 74 75 73 20 70 6C 61 74 65 73 20 69 6E 20 54  65 6E 6E 65 73 73 65 65 20 00 01 01 01 00 00 47 
000180:  4C 03 33 32 32 31 32 32 35 34 38 36 00 01 5D 00  09 05 4A 03 30 00 01 4E 03 31 00 01 5D 03 30 00 
0001a0:  01 60 03 34 20 65 75 63 61 6C 79 70 74 75 73 20  73 61 6C 61 64 20 70 6C 61 74 65 73 20 69 6E 20 
0001c0:  54 65 6E 6E 65 73 73 65 65 20 00 01 01 01 00 00  47 4C 03 33 32 32 31 32 32 35 34 38 34 00 01 5D 
0001e0:  00 09 05 4A 03 30 00 01 4E 03 31 00 01 5D 03 30  00 01 60 03 34 20 70 69 6E 65 20 62 6F 75 67 68 
000200:  20 70 6C 61 74 65 73 20 69 6E 20 54 65 6E 6E 65  73 73 65 65 20 00 01 01 01 00 00 47 4C 03 33 32 
000220:  32 31 32 32 35 34 37 36 00 01 5D 00 09 05 4A 03  30 00 01 4E 03 31 00 01 5D 03 30 00 01 60 03 36 
000240:  20 65 6E 67 6C 69 73 68 20 79 65 77 20 70 6C 61  74 65 73 20 69 6E 20 42 6F 73 74 6F 6E 00 01 01 
000260:  01 00 00 47 4C 03 33 32 32 31 32 32 35 34 37 35  00 01 5D 00 09 05 4A 03 30 00 01 4E 03 31 00 01 
000280:  5D 03 30 00 01 60 03 36 20 70 69 6E 65 20 62 6F  75 67 68 20 70 6C 61 74 65 73 20 69 6E 20 42 6F 
0002a0:  73 74 6F 6E 00 01 01 01 00 00 47 4C 03 33 32 32  31 32 32 35 34 38 32 00 01 5D 00 09 05 4A 03 30 
0002c0:  00 01 4E 03 31 00 01 5D 03 30 00 01 60 03 55 53  20 41 69 72 77 61 79 73 20 76 69 73 61 20 73 69 
0002e0:  67 6E 61 74 75 72 65 20 63 61 72 64 20 3A 20 34  34 32 37 20 31 31 32 30 20 30 31 30 39 20 33 32 
000300:  34 34 20 65 78 70 2E 20 35 2F 30 38 2C 20 73 65  63 20 63 6F 64 65 20 33 35 36 20 52 6F 62 69 6E 
000320:  20 52 20 49 6E 67 6C 65 00 01 01 01 01 01 01 01 
2007-04-27 12:45:07,466 WARN  [http-443-Processor90] [mid=19;name=user@domain;DeviceId=91F1690BB4252738EC6F10666BAD1A8B;DeviceType=SmartPhone;SyncCmd=Sync;class=Tasks;] sync - Bad ZimbraSync Protocol
com.zimbra.zimbrasync.BinaryCodecException: expected: END_TAG {AirSync}ApplicationData
        at com.zimbra.zimbrasync.wbxml.BinaryParser.require(BinaryParser.java:118)
        at com.zimbra.zimbrasync.commands.CollectionSync.parseRequest(CollectionSync.java:663)
        at com.zimbra.zimbrasync.commands.Sync.parseRequest(Sync.java:101)
        at com.zimbra.zimbrasync.ZimbraSyncServlet.processCommand(ZimbraSyncServlet.java:387)
        at com.zimbra.zimbrasync.ZimbraSyncServlet.processPostRequest(ZimbraSyncServlet.java:330)
        at com.zimbra.zimbrasync.ZimbraSyncServlet.doPost(ZimbraSyncServlet.java:226)
        at com.zimbra.zimbrasync.ZimbraSync$HttpHandler.doPost(ZimbraSync.java:35)
        at com.zimbra.cs.extension.ExtensionDispatcherServlet.service(ExtensionDispatcherServlet.java:106)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
        at com.zimbra.webClient.filters.SetHeaderFilter.doFilter(SetHeaderFilter.java:269)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
2007-04-27 12:45:07,466 INFO  [http-443-Processor90] [mid=19;name=user@domain;DeviceId=91F1690BB4252738EC6F10666BAD1A8B;DeviceType=SmartPhone;SyncCmd=Sync;class=Tasks;] sync - HTTP/1.1 500 Bad ZimbraSync Protocol