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DNS settings for Microsoft Teams

 

When a customer is moving their Office 365 tenant from Skype for Business to Microsoft Teams, or for Microsoft Teams use in general, DNS records on any domains in the O365 tenant should be verified to match the below.  There are two CNAME records to verify and 2 SRV records.  These records will be found with whatever company is the domain hoster for their domains, typical examples being companies such as GoDaddy, ClouDNS, Cloudflare, etc.  Records should be verified for both internal and external DNS. 

Host name (CNAME record)

Points to address or value

TTL (time to live)

sip

sipdir.online.lync.com.

3600

lyncdiscover

webdir.online.lync.com.

3600

 

Service (SRV record)

Protocol

Port

Weight

Priority

TTL (time to live)

Name

Target

_sip

_tls

443

1

100

3600

@

sipdir.online.lync.com.

_sipfederationtls

_tcp

5061

1

100

3600

@

sipfed.online.lync.com.

 

Further information can be found at this Microsoft site:

https://docs.microsoft.com/en-us/mic...o365-worldwide

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