[Samba] Using samba-tool to modify group?

[Brian Candler]

Sorry if I am being dense here.

I want to add a gidNumber attribute to the existing group "Domain 
Users". Is this possible using samba-tool? If not, what's the 
recommended way - using ldapmodify?

I can see that "samba-tool group add" supports a --gid-number flag, but 
as this is an important system group I don't want to delete and recreate 
it just to add this attribute.

Thanks,

Brian.