Google Workspace – Can I Share Labels Within Google Apps for Business

I apologize for answering my own question, but short of no info, this will have to do.

It appears that the only benefit and/or settings I can find on Google Apps for Business in regard to Domains is as follows:

• Domain Settings/Domain Names: Add a domain
• Gmail: Seems the only thing one can do with an additional Domain is manage Domain-specific Gmail accounts.

You need to create an organisation-wide group from your Google Apps control panel:

Here's how to create an organization-wide group:

1. Create a new group. Learn more
2. On the "Create a new group" page, click Add all users within [organization name] to this group.

The group's member list now includes a special member called All users within organization name.

You can edit the groups access settings or delete it, just like any other group. However, you can't edit the members within the All users member.

Tip: To prevent spam being sent to everyone in your domain, allow only group owners and managers to send messages to a group that has the All users member.

Quoted from Apps Administration Help, here.