I don't know if these are relevant for you:
https://www.modaco.com/forums/topic/203320-evc40-problem-platform-manager-failed/
https://groups.google.com/forum/#!topic/microsoft.public.win32.programmer.wince/EBxGPvDBQF4
And also I was reading this:
"You must use eVC 3.0 and an appropriate SDK for debugging/deployment on Windows CE 3.0-based devices. eVC 4.0 only works with CE 4.0 or later devices
(you need at least SP1 for CE 4.1, SP3 for CE 4.1 and 4.2, and SP4 for CE 4.1, 4.2 and 5.0 - SP2 added 4.2 support but removed support for 4.1!
) There were some changes in the OS's debugging support between v3.0 and 4.0.
It's recommended to install eVC 3.0 before 4.0 if you have the choice, but it should work if you install 3.0 after 4.0.
Download eVC 3.0 from here[^]. That includes the Pocket PC 2002 SDK."
from
https://www.codeproject.com/Messages/1866031/Platform-Manager-server-failed-error.aspx
Are you using eVC 3.0 or 4.0?
Also, I remember vaguely that Activesync partnership name had something to do with my connections problems. Maybe that is a hint.
Edited by stingraze 2020-01-10 3:32 AM