has there been any progress with using a modern version of EAS with Samsung devices yet?
The most recent advice I can find is from Dec 17 here:https://wiki.zimbra.com/wiki/Zimbra_NG_Modules/Zimbra_NG_Mobile/Admin_Guide (and quoted below)
which is to restrict Samsung devices to 2.5 which has some significant shortcomings. That page is for 8.8 I was wondering if anyone has experience of using EAS 14.1 with Samsung devices on more recent versions of Zimbra.
Zimbra NG Mobile and Samsung devices
Due to the amount of manufacturer customizations causing issues and out-of-spec behaviours of Samsung clients running the stock client on Android, Zimbra NG Mobile includes some specific server-side limitations to avoid as many synchronization issues as possible.
Since the vast majority of issues has been detecting when using versions of the Exchange ActiveSync protocol higher than the old 2.5, a dedicated module property, "Zimbra NG Mobile_MaxSamsungVersion", has been introduced to define the maximum protocol version usable by Samsung clients. This property is set to default to "2.5" and cannot be overridden by either EAS Filters or by the various "Zimbra NG Mobile_EASXX" properties, meaning that this value is the ONLY reference for all Samsung clients.
Using version 2.5 of the Exchange ActiveSync protocol will make devices unable to benefit of the following features:
Server-side mail search.
It's always possible to change the value of the "Zimbra NG Mobile_MaxSamsungVersion" property either via CLI or via the Zimbra NG Modules Administration Zimlet to use a higher protocol version, but doing so will likely cause one or more of the following issues:
Inability to download full emails if the default download size is set to a value lower than the email's size.
Duplicated device notifications.
Inability to properly accept or sync Meeting Requests.
We are eagerly working on fixing as many issues as possible due to server-side workarounds, but at the moment setting the Max Samsung Version limit to 2.5 is highly suggested.