Sending IceWarp Logs To An External Syslog Server, Linux Rsyslog, Change Hostname, Kibana Dashboard

Hi Community and Team,

i wanted to know how to change the hostname of the IceWarp-Syslog-Client.

My logging setup: IceWarp > Syslog-Server (linux, rsyslog, elasticsearch, kibana-syslog-dashboard)

IceWarp settings: Main Menu > System > Logging > "sending logs to syslog-server" > ip-of-syslog-server

On my syslog-server appears the correct IceWarp hostname (FQDN or IP) folder with the logs but in the kibana-syslog-dashboard the hostname appears as "Mai".
Other syslog-client-hostnames are shown correctly.

How can i fix this?
Thanks