PowerShell function to resolve Exchange Hybrid domains
Here’s a PowerShell function to check if the DNS-record exist for those domains we choose in Exchange Hybrid Configuration Wizard.
Save the file as .csv and make the header Domain,Value (comma-separated).
Example (CSV-file):
Domain,Value
domain.com,0DP5lOMbrDa8oWDoC8ujUbSNbR9kfU0/1J1f0ZxBOH39u/Yf4vCoQX/AnfZR/8qCx3HdtoSkrAX2xnhjVjuYGg==
PowerShell function:
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<# .Synopsis Check if TXT-record exist for Exchange Hybrid domains .DESCRIPTION Save txt-file from Exchange Hybrid Configuration Wizard, make it comma-seperated CSV-file and then use this PowerShell function to check if the DNS-record exist. The fucntion can ask 1.1.1.1, 8.8.4.4 or 8.8.8.8. .EXAMPLE Resolve-ExchangeHybridDNSRecord -CSVFile C:\Temp\Domains.csv -DNSServer 8.8.8.8 .EXAMPLE Resolve-ExchangeHybridDNSRecord -CSVFile C:\Temp\Domains.csv -DNSServer 1.1.1.1 .PARAMETER CSVFile Location to CSV file containing the headers 'Domain' and 'Value' from Exchange Hybrid Configuration Wizard .PARAMETER DNSServer External DNS service used to query DNS-records, use between 1.1.1.1, 8.8.4.4 or 8.8.8.8 .OUTPUTS Writes to console (Write-Host) .NOTES Version: 1.0 Author: Pierre Thoor, AddPro AB Creation Date: 2018-06-27 Purpose/Change: Initial script development #> function Resolve-ExchangeHybridDNSRecord{ Param( [Parameter(Position=0, HelpMessage="Path to CSV file containing Domain and Value header", Mandatory=$True)] [ValidateScript({ If(Test-Path $_ -PathType "Leaf"){$true}else{Throw "Invalid path given: $_"} })] [string]$CSVFile, [Parameter(Position=1, HelpMessage="External DNS service to query, choose between 1.1.1.1 | 8.8.4.4 | 8.8.8.8", Mandatory=$True)] [ValidateSet("1.1.1.1","8.8.4.4","8.8.8.8")] [string]$DNSServer ) $DNSRecords = Import-Csv $CSVFile -Delimiter "," $DNSRecords | ForEach-Object{ $ResolveDNS = Resolve-DnsName -Name $_.Domain -Type TXT -Server $DNSServer -ErrorAction SilentlyContinue if($ResolveDNS.Strings -eq $_.Value){ Write-Host "DNS-Record exist for" $_.Domain -ForegroundColor Green } else{ Write-Host " -> Error for" $_.Domain "<- " -ForegroundColor Red } } } |
