To All
Its not a problem of Microbit or any other Hardware that updates Dyndns.
The problem is caused by Dyndns itself,
a few weeks ago (around the time 2.26 was released),
I had also problems with Dyndns myself, the hardware/firmware that updated my dyndns
has not been changed since the last 5 years and it never failed to do so,
now it is not working anymore and I even got mail from DYNDNS that it was blocked....
My Linksys router on another DYNDNS name is still ok but nomatter what I try with the other one
is not working anymore and there is nothing wrong with the hardware since I can use it with other lookalike
software. The only way to keep updating that specific dyndns is to use theire own free DynDns updater.
Guy ON4AOI