Getting this error with the latest connector 126.96.36.19946 (on Win8.1) and the error occurred when they tried to uninstall the connector not during installation. It installed okay but the scalix server type did not appear in the options when trying to create a new profile. Therefore they were going to uninstall and reinstall to get this added to the list of options for a new profile.
I don't think there is a later connector to use - is there?
They have tried a repair and remove but neither works and it wont uninstall - gives the 1722 error?