Hi Max,
You can use the parseDateTime function to convert the string to a datetime, you can use this in a change action in a microflow. For example
parseDateTime(22-03-2017, 'DD-MM-YYYY')
Hi Max, you can also create a small generic microflow with a string variable as input, and a DateTime variable as output. In the microflow you create the DateTime variable with the parseDateTime function with the input string variable.
Hi Max, please look at https://docs.mendix.com/refguide7/parse-and-format-date-function-calls
parseDateTime('21-05-2015', 'dd-MM-yyyy')