ArcPad

The key areas of improvement in ArcPad 10.2.4 is feature synchronization and datum transformation support.

Better handling of z and m values in points, lines and polygons. This includes resolution of BUG-000095878—The 'Synchronize Data with ArcGIS Server' tool in ArcPad 10.2.3 alters the z-value to 0.000 for line and polygon feature classes in an enterprise geodatabase.
NTv2 transformations now supported. This includes resolution of ENH-000093501—Provide support for OSTN02 NTv2 Transformation in ArcPad. To use NTv2 transformations on Windows Mobile some files need to manually copied from your desktop to device. See Supported datums for more information.

SHA-1 certificate no longer supported

Secured feature services and ArcPad Packages hosted in ArcGIS Online will continue to be available to users on devices that support SHA-2 certificates. This security type is available on Windows (XP, 7, 8.1, 10) and Windows Embedded HandHeld 6.5 devices that have been patched by the manufacturer. Devices with operating systems older than Windows Embedded HandHeld 6.5 cannot be patched. Devices that only support SHA-1 certificates, can not use secured feature services and ArcPad Packages hosted in ArcGIS Online.

This is an industry wide action to improve internet security. The following article describes Microsoft's position. https://support.microsoft.com/en-us/kb/2986556. Esri has made contact with many hardware manufacturers who already provide, or are working on SHA-2 patches for Windows Embedded HandHeld 6.5 models. If you have questions about the availability of the SHA-2 patch for your Windows Embedded Handheld 6.5 device we encourage you to contact the manufacturer.

9/23/2019