Hi,
I can think of 2 options on how to achieve this:
Create custom reports by connecting to TestManager’s interfaces:
Create some components to generate a test execution report (eg excel, html). You can use them together with testing and execution templates and store them in your prefered archiving system.
We are actually using excel templates to store test case results and get UAT sign off from stakeholders. E2E execution of automated test cases is still going on with Test Manager automation execution.