Exchange 2016 DNS Settings

The following DNS settings are needed for our Exchange 2016 setup.

MX 10

MX 10

CNAME webmail.<yourdomain>

TXT v=spf1 a mx ip4: ip4: ip4: -all

SRV _autodiscover._tcp SRV 0 0 443

In your DNS zone editor add a SRV record with the following information:

  • Service _autodiscover

  • Protocol _tcp

  • Name   Enter one of the following values:

    • Enter @ if your registered domain is your cloud-based domain. For example, if your registered domain is  enter @.

  • Priority 0  (or as per your design)

  • Weight 0  (or as per your design)

  • Port 443

  • Target 

  • TTL   Verify that an appropriate TTL is selected, 1 hour is a common default.  (If you are approaching a migration, this should be decremented to allow for quicker cutover)

Change <yourdomain> to your full domain name. For example if your domain name is The CNAME would be: