By default Unwired Server administration includes a certificate for HTTPS encryption. This certificate differs from the one you configure for HTTPS encrypted synchronization.
For Unwired Server administration, a default certificate is provided for you. This administration certificate is saved as a .keystore file in the <UnwiredPlatform_Install>\Servers\UnwiredServer\tomcat folder. This is a Java keystore formatted file. The keystore password is "changeit" by default. In a production deployment of Unwired Server, you would want to change this file and supply a new password for it.