I've got 5.0.11_GA_2695 server and 5.0.2817.11 ZCO. When Outlook attempts to sync the GAL, I see get a failure and see this message in the "Zimbra Send/Receive Progress" window:

"Server returned soap fault"

In the logs, these lines seem to show the problem:

04-12-2008 14:50:22.817 [4476]: *3* HTTP body:
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Header><context xmlns="urn:zimbra"><change token="295709"/></context></soap:Header><soap:Body><soap:Fault><soap:Code><soap:Value>soap:Sender</soap:Value></soap:Code><soap:Reason><soap:Text>permission denied: cannot sync GAL</soap:Text></soap:Reason><soap:Detail><Error xmlns="urn:zimbra"><Code>service.PERM_DENIED</Code><Trace>btpool0-89:1228420158067:17b4093003ccfc4b</Trace></Error></soap:Detail></soap:Fault></soap:Body></soap:Envelope>
04-12-2008 14:50:22.817 [4476]: *3*
I've removed and readded the ZCO a few times and removed the anti-virus software but that hasn't worked. Everything else is working fine - email arrives and syncs and 2 way calendar sync is working.

Any ideas as to what is going on?