The only thing not working so far, is assigning rights from Outlook.
You need some heavy tuning in sogo.conf as well. I increased number of workers to 90 and the vmem size to 4mb, had to increase to 20GB of memory and 4 processors to get apache/sogo to properly handle ~40 activesync connections to 15 mailboxes. Some with up to 25GB in them.
It works like a charm now, tho Outlook 2016 is preferred for stability, and some issues can arise when the folder structure is ‘funny’ I suspect imapsync issue due to user error (me).