Capture all errors in a powershell script and email - powershell

Question

I have a script with many sections such as below that runs nightly. I would like to get it to email any/all errors so i can be alerted and review the errors. I'm having trouble with the first step which is to capture all/any errors... I assume to a file which i could email or capturing to some kind of buffer that i could then email would be even nicer. Any help with both steps would be appreciated - especially the capturing part.
#---- Set Exchange archive licnse for all users with an Office license ----
Get-MsolUser -ALL | where {($_.Licenses.accountskuID -contains
"Tennant:STANDARDWOFFPACK") -and ($_.Licenses.accountskuID -notcontains
"Tennant:EXCHANGEARCHIVE_ADDON")} | Set-MsolUserLicense -AddLicenses
"Tennant:EXCHANGEARCHIVE_ADDON"
#-------------------------- ENABLE LITIGATION HOLD ----------------------
Get-Mailbox -ResultSize Unlimited -Filter {RecipientTypeDetails -eq
"UserMailbox"} | Set-Mailbox -LitigationHoldEnabled $true -
LitigationHoldDuration 2555

Answer 1

Error messages should automatically be captured in the $error variable; use $error[0] for the latest message.
You could then use that as the body for your email in conjunction with the Send-MailMessage Cmdlet
example:
$body = "";
foreach ($e in $error) {
$body += "<hr /><pre>" + $e.ToString() + "</pre><hr />";
}
Send-MailMessage -BodyAsHtml -Body $body -SmtpServer "smtp_server_address" -From "alert#somedomain.tld" -To "your-email#somedomain.tld" -Subject "PowerShell Error Report"

Answer 2

In your code, you need to trap errors in order to log them, even write to your own event log...
https://blogs.technet.microsoft.com/heyscriptingguy/2013/02/01/use-powershell-to-create-and-to-use-a-new-event-log
https://blogs.technet.microsoft.com/heyscriptingguy/2013/06/20/how-to-use-powershell-to-write-to-event-logs
... or write your own log function.
Example:
https://gallery.technet.microsoft.com/scriptcenter/Write-Log-PowerShell-999c32d0
Or, start with using PowerShell logging.
Example:
Enable logging in Group Policy
https://gallery.technet.microsoft.com/scriptcenter/Write-Log-PowerShell-999c32d0
Use PowerShell transcript
Example:
https://technet.microsoft.com/en-us/library/ff687007.aspx?f=255&MSPPError=-2147217396
Then have those stored in a central share that you can pull into an email as an attachment.