Command to run on multiple computers where winrm is disabled

The main idea is to find out Certificates expiring on remote servers.

When the below command is run on individual servers, it gives the desired output.

Get-ChildItem -path Cert:\LocalMachine\My |select Issuer,NotAfter | select-string "^(?!.*MACHINE)" | out-file -filepath $logfile -append

But when i run it as a script to run on multiple computers it doesnt work. (WINRM is disabled)

$servers = Get-Content -path "C:\Servers.txt"

ForEach ($server in $servers)

{Enter-PSSession -computerName $server

Get-ChildItem -path Cert:\LocalMachine\My |select Issuer,NotAfter | select-string "^(?!.*MACHINE)" | out-file -filepath $logfile -append

exit-pssession}

Can somebody help me complete the script.