You are the administrator for a company named Contoso, Ltd. The company has a subscription to Office 365 for midsize business and enterprises. The company uses Microsoft Lync Online. The company uses the contoso.com SIP domain. Users frequently work from home. The company does not support VPN connections to the internal network. You need to ensure that users who work from home can discover the Lync Online service when they sign-in to the Lync Online clients. Which DNS records should you create in the external DNS zone ofcontoso.com?

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B. a canonical name (CNAME) record for_sip._tls.contoso.com that points to contso.lyn.com

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A. a service location (SRV) record for _sip._tls.contso.com that points to port 443 on sipdir.online.lync.com

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C. a record for im.contso.com that points to the IP address of a Lync Online server

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D. a service location (SRV) record for_sip._tcp.contso.com that points to port S060 on sipdir.online.lync.com

You are the administrator for a company named Contoso, Ltd. The company has a subscription to Office 365 for midsize business and enterprises. The company uses Microsoft Lync Online. The company uses

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