Your account could not be validated against the Zimbra server

[Matt1]

I am having issues with the Zimbra connector on one of the user's machines. I have upgraded Office from 2007 to 2010 and installed all the updates hoping this would resolve it. Reinstalled the Zimbra Connector numerous times. All to no avail.

Please see the log attached.

[Jbrabander]

I've had this same thing for ages. Works great if I use the 6.0.8 or 7.0.0 connector.

[fsiegel]

Not sure what's going on here. Looks like your profile is configured ok -- Secure on, and port 443. Is there a proxy issue? Looks like you have No Proxy configured. What if you configure it to use IE settings?

[fsiegel]

Could it be a certificate thing? That's new somewhere around 7.1

You could try checking Allow invalid certificates on the Zimbra Support Toolbar (in Outlook 2010, Zimbra tab, Support section, Advanced