So, I created a group with a certain name (same as on Yahoo), but now I am thinking I want that group to be a subgroup of another group.? Can I still use the name as the name of the subgroup?
The name of a subgroup has two components. One is the name in common with its primary group (the "subdomain" name), which was the primary group's name before it had any subgroups. See for example the beta group - it's primary is now "main", and "beta" is in common with its subgroups.
The "subdomain" or primary name must be unique system-wide, but the subgroup names only need to be unique with respect to each other.
If the existing group has no (important) content, and you want to simply start it over as a subgroup, that I think you can just do using the same name without first needing to rename or delete the existing group. Because that subgroup name will be "inside" the primary group name, in a way like one folder inside another.
If the existing group does have important content it would take an action by support to pick it up and make it a subgroup of another group. Same answer, no name conflict (and that would likely leave the original group name unreserved).
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I see where you said even if a group is deleted the name is reserved indefinitely - would that mean I can't switch it?? Let me know, thanks!
Delete reserves, rename does not. So if you want to delete a group and later re-use its name, rename it before you delete it. ?
Shal Farley