Although the sample DNS configurations just shown can be used to meet the minimum requirements for Lync, many organizations rely on the Lync client’s capability to automatically find the Lync pool and sign in the user, an optional but very useful feature. To provide automatic client sign-in, an SRV record is required for
_sipinternaltls._tcp.<domain> over port 5061 that maps to the fully qualified name of the pool. For example, Figure 11.4 shows the configuration of the SRV record that would be added to the sample DNS configuration shown previously to provide automatic client sign-in for the
companyabc.com Lync deployment.
Note that SRV records hold information ...