Add the DNS Records below
Host name: selector1._domainkey
CNAME: selector1-pariswells-com._domainkey.pariswells.onmicrosoft.com
TTL: 3600
CNAME: selector1-pariswells-com._domainkey.pariswells.onmicrosoft.com
TTL: 3600
Host name: selector2._domainkey
CNAME: selector2-pariswells-com._domainkey.pariswells.onmicrosoft.com
TTL: 3600
CNAME: selector2-pariswells-com._domainkey.pariswells.onmicrosoft.com
TTL: 3600
Once created , powershell
New-DkimSigningConfig -DomainName “google.com” -Enabled $true
If keys have already been created , run the below
Set-DkimSigningConfig -Identity “google.com” -Enabled $true
Disable the onmicrosoft.com.au DKIM and enable on all of the customers domain
Disable the onmicrosoft.com.au DKIM and enable on all of the customers domain