Unfortunately it looks like TAPI for 11.0 was not tested with Win2016, and as CUCM 11.0 reached end of software maintenance over a year ago, I assume such testing will not be forthcoming :/ I'm not aware of any known issues or changes to the TSP in support of Win2016, so it 'should work'; however the risk is that if OS-dependent issues are suspected, TAC/engineering may not be able to pursue an investigation/fix.