Currently running ZCS6NE and I'm having problems getting the iPhone to autocomplete from the GAL (or even search the GAL), I have two domain and set the following:

zimbraGalSyncInternalSearchBase to ROOT
zimbraGalInternalSearchBase to ROOT

for both domains (as the domains are for the same company and want to search both domain GALs)

the iPhone sync's mail personal contacts and calendar fine just not the GAL. If I go to contacts on the iPhone and select groups and then "user" Global Address List it always show empty or no results.

Auto complete and GAL browsing works in the zDesktop and web client so I'm at a loss, what haven't I done ?