Powershell script to list last reboot of vm's under a Azure Subscription

Question

is there a Powershell script to list last reboot of vm's under a Azure Subscription? result maybe displayed in the ps or in a file.

Answer 1

If data from the last 90 days would be sufficient you could get the information from the Activity Log.

Get-AzActivityLog -ResourceGroupName resource_group_name -StartTime (Get-Date).AddDays(-90) | Where-Object {$_.OperationName -eq "Restart Virtual Machine" -or $_.OperationName -eq "Start Virtual Machine" -or $_.OperationName -eq "Deallocate Virtual Machine"} | Select-Object ResourceId,EventTimestamp,OperationName,Caller

This would query the information on a resource group not subscription level though. You could export the information to CSV by adding | Export-Csv .\file_name.csv at the end of the command.