The DPI Synchronization feature ensures that the DPI (dots per inch) setting in a remote desktop or published application matches the client machine's DPI setting.
When you start a new remote desktop or published application, the DPI value in the remote session is set to match the DPI value of the client machine. The DPI Synchronization feature cannot change the DPI setting for active remote sessions.
The DPI Synchronization feature is controlled by the Allow display scaling option, which is turned on by default. You can turn off this option and manually adjust the resolution. For information, see Adjust the Screen Resolution for Remote Desktops and Published Applications. A Horizon administrator can also disable the DPI synchronization feature.