Hi,
You are not even using the mvfilter function, you are searching for it as a string.
What is the goal, do you want to filter for events that have the host in the list of servers, or do you want to change the servers list somehow?
If it is the former question, then you could use the mvfind command, eg:
| makeresults
| eval host="serverName02", servers="serverName01;serverName02;serverName03"
| makemv delim=";" servers
| where isnotnull(mvfind(servers,host))
Is that what you were looking for?
Hth,
Kai.
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