Test Cases Approval
I am not sure whether this is a function of test manager - but here goes...
What I am looking for is the ability to have test cases that have been executed then require appoval by end users.
Does the Test Manager have something similar either via e-mail or having the approvers log into a web site to approve test results.
Re: Test Cases Approval
Sounds to me like you are talking about user acceptance testing.
How you execute user acceptance testing is completely driven by your company. I've been in places where it was done via email, and I've been in places where it was done by formal sign-off on a test document.