Specially on notebooks long email distribution list resulting in group expansion are a big pain for users. Reason for this are local address books of the domain which are normally used on the road. There are two ways to work around expansion of server based groups.
1. For end-users:
Append your own domain name behind the address (example: info-group@Acme). This ensures that the domain will be treated as a remote group at the client. But the server will finally find out that this is a server based group and expand it accordingly.
2. For Admins:
Add the $ExpandGroups to the design of the Memo form. This field determines if groups are expanded. 0 = no groups, 1 = local groups, 2 = public groups, 3 = all groups. This change does -- in contrast to the first solution -- only affect the visible fields like SendTo, CopyTo and BlindCopyTo. The internal field Recipients is expanded in any case. Therefore $ExpandGroups="1" is the most logical and convenient setting.