we are using an additional address book for external contacts that is shared among all users.
Everyone can add and change entries there.
In Zimbra Online and Desktop auto completion uses this address book, but on the iPhone the "global address list" does not search in this address book.
I think this is because the iPhone only searches the GAL.
So the question is: How to bring this address book into the GAL, so that it can be searched from the iPhone.
I read quite a lot of things about internal and external GAL sync accounts, but I think all these things will lead to an address book that can't be user edited.
Thanks in advance