Unable to Change the Preferred Search Center in Sharepoint 2013 -My Sites
From power shell:
$ssa = Get-SPEnterpriseSearchServiceApplication$ssa.SearchCenterUrl = "https://url-of-the-search-center/"$ssa.Update()Verify the setting :
$ssa = Get-SPEnterpriseSearchServiceApplication$ssa.SearchCenterUrlNow reset IIS by running this command:
iisreset
Or you can reboot the server .-----