https://security.microsoft.com/dkimv2
selector1._domainkey CNAME selector1-domain-com._domainkey.tenantname.onmicrosoft.com
selector2._domainkey CNAME selector2-domain-com._domainkey.tenantname.onmicrosoft.com
https://security.microsoft.com/dkimv2
selector1._domainkey CNAME selector1-domain-com._domainkey.tenantname.onmicrosoft.com
selector2._domainkey CNAME selector2-domain-com._domainkey.tenantname.onmicrosoft.com