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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 are going to focus on how to check the DNS SRV records for Office 365 from a Windows machine and a website.

Information DNS SRV records for Office 365

There are two SRV records that we need to check in DNS:

  • _sipfederationtls._tcp
  • _sip._tls

It can take time before it actually will resolve. Don’t do a check immediately after you added the SRV record to your external DNS. It will most likely not yet got resolved.

Verify DNS SRV records from Windows

Let’s verify the SRV records for Office 365. In this example, we are going to verify the SRV records against the domain klm.com. Change the domain to yours. Start Command Prompt on your Windows machine.

The results are good. Both of the SRV records are added in DNS and we can verify it. Now that we did an SRV lookup with Windows, we like to do that with a DNS lookup website.

Verify DNS SRV records from a website

Open your browser and go to the website mxtoolbox.com. Make sure that it’s showing DNS Lookup SRV at the top. Fill in the domain name _sipfederationtls._tcp.klm.com and click on the SRV Lookup button. Change klm.com to your domain.

Verify DNS SRV records for Office 365 mxtoolbox DNS SRV lookup

The results will show that the SRV is added to DNS.

Verify DNS SRV records for Office 365 MX Toolbox DNS SRV lookup results

Do the same with _sip._tls. Fill in_sip._tls.klm.com and do an SRV Lookup.

Verify DNS SRV records for Office 365 MX Toolbox DNS SRV lookup second results

Will you check the SRV records with Windows or with the website mxtoolbox.com? Both will work.

Conclusion

To sum it up, you did learn how to check the DNS SRV records for Office 365. You did not only learn how to check the DNS SRV records with Windows, but you also did learn how to check with a DNS lookup website. Did you enjoy this article? If so, you may like Get Organizational Units with PowerShell. Don’t forget to follow us and share this article.

ALI TAJRAN

ALI TAJRAN

ALI TAJRAN is a passionate IT Architect and IT Consultant. His specialism is designing and building complex enterprise environments. He started Information Technology at a very young age, and his goal is to teach and inspire others. Connect with ALI TAJRAN on social media. Read more »

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