We are having the same issue since patch5 and created a case about this now.

Hi fellow sysadmins! We have been troubleshooting for 6 months with NG mobile module an issue where several makes and models of Android from Nokia, Motorola, Huawei and Sony mobiles accumulate activesync delete commands into their internal queue locally on the mobile device itself. This happens with...

We have trouble with the brand new ZimbraDrive plugin for Nextcloud. (We followed instructions here: https://wiki.zimbra.com/wiki/Zimbra_Drive/How_to_Install_Zimbra_Drive) The plugin does not seem to be able to save its configuration. The configuration under Admin settings turn into blank again if y...