Originally Posted by WineCountryUA

While not sure UA would change the destination to ZRH (at this time), self service on the app is not necessarily the best way to check that. You are not rerouting but changing destinations -- that needs a call .

However as mentioned, if MUC is your destination and since the airport is NOT closing, I would not make any changes (unless UA cancels and then a number of new options will become available - such as the ZRH for free).

I might avoid connecting in MUC but not travel to MUC. Sometimes being over pro-active is not the right approach.