Change TTL for DNS record in Windows Server
Before we change the DNS record in Windows Server, changing the TTL value to a lower value is essential. We want the TTL to be as short as possible so that if we make a change, the old record will…
DKIM selector2 not working for Microsoft 365 domain
We did add a domain to the Microsoft 365 tenant and enabled DKIM for that specific domain. While checking the DKIM records (selector1 and selector2), the result shows that no DKIM record found for the selector2 record. Why is the…
Add second domain to Exchange Server
The Exchange Server mail flow is working great. At the moment, only one domain is configured. But, you like to add a second domain to Exchange Server on-premises. This article will teach you how to add a second domain to…
Configure internal DNS for Exchange
After installing Exchange Server, the next step is to configure internal DNS for Exchange. It's essential to keep the same namespace internal and external. We will create a couple of forward lookup zones in Active Directory and test the namespaces.…
Verify DNS SRV records for Office 365
After adding the Office 365 SRV records in the external DNS, we like to verify the DNS SRV records. There are many ways to check the DNS SRV records. We will focus on how to check the DNS SRV records…