The "@ExpandNameList" is an undocumented formula which can be used in
resolving the groups.
Below is a simple version of the code to resolve the Group in a field:
Place following code in Input translation event:
@ExpandNameList(@Subset(@DbName;1);@Trim(<Field Name>)
On change event Place the following code to refresh the document
_doClick('$Refresh', this, '_self', '#_Refresh<Field Name>')
Note: There should not be space between #_Refresh and the Field Name. This
code will also evaluate the names/short names (Should be unique in your
Domino directory(or address book)) to their hierarchal name/email address.
The draw back of using this method is "if resolved group name contains more
than 64K then an error page will be displayed". This page could be avoided
using the error handler in formula language.