Is there a way to identify a list of testcases that are assigned to a specific Milestone?
Thanks for your posting. The search at the top-right of TestRail currently only supports simple text-based queries and no complex attribute-based searches. If you would like to search on the test suite level though, you can add the Milestone column to the case grids (via the column icon at the top-right of the tables) and then click on the Milestone column header. This will group/sort by the available milestones and it’s very easy then to identify the test cases you are looking for.
If you are looking for search/filter capabilities when creating test runs/plan, you can use the Select Cases dialog and the attribute filters in the sidebar. Simply click the “Select cases” link when creating test runs/plans for this.
I hope this helps and please let me know in case you have any further questions.