Here’s a handy PowerShell command you can run to see when one of your serversclient machines last rebooted
Get-CimInstance -ClassName win32_operatingsystem -computername SpecifyMachineName| select csname, lastbootuptime
Once ran you should get a result like the following
You can even run the command against multiple machines by putting a comma after your machine name like the following
Get-CimInstance -ClassName win32_operatingsystem -computername server1, server2, server3| select csname, lastbootuptime
Hope this Helps!