You can test such things Exchange ActiveSync (EAS) issues, including
Windows Mobile 5 and Windows Mobile 5 w/MSFP, Windows Mobile 6.1
clients with AutoDiscover, Outlook RPC over HTTP (Outlook Anywhere),
Outlook 2007 and AutoDiscover and even inbound SMTP. The tool will give
you a nice detailed report that you can drill down into and research
where any failure might be.
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