Integration Services - Unclear Licensing - Missing docs

Hello,

the licensing of the Integration Services is unclear. The documentation does not cover the following questions and/or there are missing features:

Several single licences like the Named Developer or Unattended Robot contains a number of API calls per month. Moreover individual SKUs like “UiPath - Flex - Integration Service API Calls Bundle - 3M” can be purchased.

  1. Is the total number of API calls shared over all Tenants or can I assign the API calls per Tenant?
  2. Is there any overview like the Document Understanding/AI Unit usage?
  3. How is a API call defined / billed? For example if I have the “Microsoft Outlook 365” connector configured with one account and one Trigger with event “New email received” defined: Is one new email equals to 1 API call?

It would be great if the documentation has examples like in the Document Understanding section.

Best Regards
Dennis