Hopefully you got through this. In my experience, this usually means that WOWorkersCount is too low. You can tell by running this from /opt/mailcow-dockerized:
docker logs -n 10000 mailcowdockerized_sogo-mailcow_1 | grep -i “no child”
if that does come back with error, please do the following assuming you have the memory for it:
open this file:
/opt/mailcow-dockerized/data/conf/sogo/sogo.conf
adjust:
WOWorkersCount = “20”;
to: (or replace 20 with the number of simultaneous connections present - note, you need 1 for each activesync connection)
WOWorkersCount = “100”;
then,
cd /opt/mailcow-dockerized
sudo docker-compose restart sogo-mailcow