During the installation of Phoenix you may get the warning message either at the end of the installation in the installation details or as a pop-up message during the installation. This message will inform you that you do not have mscal.ocx and/or comglg32.ocx components installed and Phoenix functionality is not fully available.
These components are required for the functioning of the calendar widget in forms displayed using Phoenix client. They are usually shipped together with Microsoft Office components, but they may be also included in some other software. To solve this issue you need to install the Microsoft Office. You may also ignore this message, if you do not plan to use the calendar widget in your applications.