Let users access personal folder when using webdav on iPad

Hi,

I am setting up Lion server so users on an Active Directory network can access webdav folders from iPads.

I have got this working fine when accessing a shared multi user folder.

I want users to also be able to access their own personal folders, with no one else being able to access the folder.

I can share the Users folder but this will give each user access to other users folders how can I fix this?

Thanks