SharePoint - Search Admin

In the event of a server death, you may need to move your Search Admin to another server.

This is actually fairly easy:

$searchapp = Get-SPEnterpriseSearchServiceApplication "Sample Search Service Application"
$admin = Get-SPEnterpriseSearchAdministrationComponent -SearchApplication $searchapp
$admin | Set-SPEnterpriseSearchAdministrationComponent -SearchServiceInstance NewServerName –Force

 

But once you have moved Admin, your crawlers may not run until you also do this:

Suspend-SPEnterpriseSearchServiceApplication $searchapp
Resume-SPEnterpriseSearchServiceApplication $searchapp