In "Options > Global > Other" "Use Zimbra Desktop as default mail application" checkbox is grayed. Manualy - "Taskbar and Start Menu Propeties" > "Start Menu" > "Customize" > "Show on Start Menu" > "E-Mail Link" : all available client but no Zimbra. Using Vista HP SP2. MS Office Outlook 2007 was installed before Zimbra. Is any solution

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