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1. In the WebUI, access Tasks> Lync Survivable Branch Appliance (or Skype for Business Survivable Branch) > Setup SBA.

2. Click Security.

   Caption
   0 Figure 1 Apply Security Template

3. From the Apply Version drop down list, select the applicable TLS option (TLS 1.2 Only or TLS 1.0-1.2).

   Note
   The following are limitations for using TLS 1.2 Only or TLS 1.0-1.2 Valid for Skype for Business On Premises SBA only. Valid for WS2012R2 ASM. Valid with the following clients: Lync 2013 (Skype for Business) Desktop Client, MSI and C2R, including Basic 15.0.5023.1000 and higher. Skype for Business 2016 Desktop Client, MSI 16.0.4678.1000 and higher, including Basic. Skype for Business 2016 Click to Run Require the April 2018 Updates: Monthly and Semi-Annual Targeted – 16.0.9126.2152 and higher Semi-Annual and Deferred Channel – 16.0.8431.2242 and higher Requires Skype for Business - March 2018 or Higher Cumulative Updates. Refer to Installing Cumulative Updates for Lync SBA. Requires ASM RollUp June 2018. Apply the Security Template after applying the the ASM Roll-Up. Refer to ASM Roll-up Update. Before enabling TLS 1.2 Only on SBA, prepare your Skype for Business environment: https://blogs.technet.microsoft.com/nexthop/2018/04/18/disabling-tls-1-01-1-in-skype-for-business-server-2015-part-1
   Info
   Depending on the SBA deployment, configure the appropriate TLS version. See below for guidelines. TLS 1.2 Only is supported for Lync 2013 with security update and Skype for Business. TLS 1.2 Only is not supported in Lync 2010.

4. Click Apply TLS Version.

5. For Microsoft SBA Security Hardening, click Apply Default Template. If SBA Security Hardening has been run on the SBA at deployment, this field will be greyed out.
   

6. For Custom Security Template, click Browse and select the applicable Security XML file. You need a Windows Server security template XML file created using the Microsoft Security Configuration Wizard (SCW). Refer to the following for how to create the file:

   Caption
   0 Figure 1 Windows Security Templates
   Windows Version Microsoft Security Configuration Wizard Reference Windows 2008 Microsoft Security Configuration Wizard (SCW) Windows 2008R2 Windows 2012R2 Microsoft Security Configuration Wizard (SCW)

7. Click Submit Security Template file. The operation will take up to to five minutes to complete.

    

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