Exchange DNS¶

Exchange users should have the following records set up via DNS

• MX

  • domain.com MX 10 cas1.contoso.com

  • domain.com MX 10 cas2.contoso.com

  • domain.com MX 20 email.contoso.com

Priority 10 on the MX records for cas1 and cas2 will ensure they use DNS round robin to connect, if that fails, it will hit your load balancer for mail.

• SRV

  • Value : _autodiscover._tcp.domain.com

  • Weight : 0

  • Priority : 0

  • Port : 443

  • Target : email.contoso.com

The SRV (autodiscover) record is a requirement of having an Exchange server, this will ensure that your settings are automatically picked up by your email client.

• SPF

  • v=spf1 include:spf.contoso.com ~all

This SPF record ensures your users look to your SPF settings for their own. Essentially allowing you to add servers to the solution without them violating the SPF policy of your users.

The alternative would be to ask them to update their settings every time there is a change to the servers in the solution. This is cleaner.