Search O365 mailboxes for badness

O365search.ps1

# Get login credentials 
$UserCredential = Get-Credential 
$psOption = New-PSSessionOption -ProxyAccessType IEConfig -ProxyAuthentication Negotiate
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.compliance.protection.outlook.com/powershell-liveid -Credential $UserCredential -Authentication Basic -AllowRedirection -SessionOption $psOption

Import-PSSession $Session -AllowClobber -DisableNameChecking 
$searchQry = '(Subject:<YOUR SUBJECT HERE) AND (Received:today)' #KQL https://msdn.microsoft.com/library/ee558911(v=office.15).aspx
$compName = "20180514-01-MalwareEmails"


##
##  Initiate Search query
##
$compSearch = New-ComplianceSearch -Name $compName -ExchangeLocation all -ContentMatchQuery $searchQry

##
##  Start Actual search
##
Start-ComplianceSearch -Identity $compName

##
##  Get status of search, rinse repeat until finished.
##
Get-ComplianceSearch -Identity $compName | fl


##
## Now purge the emails/items found
##
New-ComplianceSearchAction -SearchName $compName -Purge -PurgeType SoftDelete

##
## Get status of search and purge, rinse repeat until finished.
##

Get-ComplianceSearchAction -Identity "$($compName)_Purge" 

## End session
Remove-PSSession $Session