The latest version of this script you can get on GitHub - https://github.com/vfedenko/

Some policy settings which are not included in a default Office 2016 ADMX file. The policy allows accepting all first run popups and disables default file type selection (XML/OpenDocument) during first run.

 

ADMX:

 

XML
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<policyDefinitions revision="1.0" schemaVersion="1.0"  <policyNamespaces    <target prefix="Office2016ProPlusFirstRun" namespace="Office2016ProPlusFirstRun.Policies.Office2016ProPlusFirstRun" /> 
    <using prefix="windows" namespace="Microsoft.Policies.Windows" /> 
  </policyNamespaces> 
  <resources minRequiredRevision="1.0" /> 
  <categories    <category name="Office2016ProPlusFirstRun" displayName="$(string.Office2016ProPlusFirstRun)" /> 
  </categories> 
  <policies    <policy name="AcceptAllEulas" class="User" displayName="$(string.AcceptAllEulas)" explainText="$(string.AcceptAllEulas_Help)" key="SOFTWARE\Microsoft\Office\16.0\Registration" valueName="AcceptAllEulas"      <parentCategory ref="Office2016ProPlusFirstRun" /> 
      <supportedOn ref="windows:SUPPORTED_Windows7" /> 
      <enabledValue            <decimal value="1" /> 
      </enabledValue> 
      <disabledValue            <decimal value="0" /> 
      </disabledValue> 
    </policy> 
    <policy name="DisableOOXMLBallot" class="User" displayName="$(string.DisableOOXMLBallot)" explainText="$(string.DisableOOXMLBallot_Help)" key="SOFTWARE\Microsoft\Office\16.0\Common\General" valueName="ShownFileFmtPrompt"      <parentCategory ref="Office2016ProPlusFirstRun" /> 
      <supportedOn ref="windows:SUPPORTED_Windows7" /> 
      <enabledValue            <decimal value="1" /> 
      </enabledValue> 
      <disabledValue            <decimal value="0" /> 
      </disabledValue> 
    </policy> 
  </policies> 
</policyDefinitions>
 

 

ADML:

 

XML
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<policyDefinitionResources revision="1.0" schemaVersion="1.0"  <displayName  </displayName> 
  <description  </description> 
  <resources    <stringTable      <string id="Office2016ProPlusFirstRun">Office 2016 ProPlus - First Run</string> 
      <string id="AcceptAllEulas">Disable Accept EULA prompt</string> 
      <string id="DisableOOXMLBallot">Disable Default File Type Dialog</string> 
      <string id="AcceptAllEulas_Help">When this policy is enabled, all End User License Agreements are accepted without prompt.</string> 
      <string id="DisableOOXMLBallot_Help">When this policy is enabled, user is not asked to set a default file type (XML/OpenDocument) during Office 2016 first run.</string> 
    </stringTable> 
  </resources> 
</policyDefinitionResources>
Source: http://blog.fedenko.info/2017/12/office-2016-proplus-first-run-admx.html
Author: Slava Fedenko - http://blog.fedenko.info