Application tunnels provide a secure pathway between your Atlassian cloud organization and Data Center or Server instances that live in your network. You can link only one such organization (and its multiple products) to a single self-managed instance, for example Confluence Data Center.

References :  What are application tunnels? ,  Application tunnels overview

When a user is invited to join a product or site, they automatically get an Atlassian account. The status “Invited” means that the user has not accepted the invitation yet, but they already have an account created for them.

References :

Accept the invitation to join your service project team

Customer is not receiving invitation emails when invited to a Service Management project

Organization insights is a feature that provides analytics and reports on your organization’s users, products, and security. You can access it from the Insights tab in your organization settings.  Organization insights is available for all Atlassian cloud products and plans 1 .

References  :

View organization insights

The Billing page shows you the number of billable users for each product on your site, as well as the user tier and the monthly cost. You can filter by product and site to see the specific details for Jira Software on “acme.atlassian.net”.

References :

How to prepare for ACP-520: Atlassian Cloud Organization Admin Certification , section “Manage product subscriptions & billing”

Manage your bill for Standard and Premium plans, subsection “View your bill”

After the products from Original were transferred to Destination, Jira Software will appear as a single product under the Destination URL. This is because the Original organization was deleted, so there is no longer a separate URL for it.

References :

How to prepare for ACP-520: Atlassian Cloud Organization Admin Certification , section “Manage multiple sites and products”

Transfer products to another organization, subsection “What happens after you transfer products?”

This statement is false because every site belongs to an organization.  When you create a new site, you either join an existing organization or create a new one 1 . You cannot have a site without an organization.

References :  Get started with an Atlassian organization ,  Understand Atlassian sites and organizations

If a group that was used to share a filter or a dashboard was deleted, the users who belonged to that group would no longer receive the filter subscriptions or see the dashboard .

References :

[Manage shared filters and dashboards]

[Manage users, groups, permissions, and roles in Jira Cloud]

If Ann’s email domain is not verified by your organization, it means that you do not own or manage her account. However, she may have a managed account in another organization that has verified her domain.  In that case, you cannot enforce security policies, deactivate, or delete her account 1 2 .

References :

Verify a domain to manage accounts

Solved: Verify domain - Missing accounts

Currently, you can only create one sandbox for each linked product 1 . Since you have only two products (Jira Software and Confluence), and you already have a sandbox for Confluence, you cannot create any more sandboxes for your organization.

References :  Manage product sandboxes