On Small Business Servers, you should not manage users or edit shares on folder level the same way you do on regular NT4/2000 servers. Small Business Servers have their own wizards that must be used for these purposes.
Obviously some SBS software takes control over server functions that cannot be changed when doing things without using the wizards. This will deny Zanda (NVC's distribution agent on the workstations) access to the Norman share even though the nvcuser can access this share manually. The result is unsuccessful distribution.