Publish Outlook 2016 in XenApp

Download Office 2016 Administrative Template files and import ADML and ADMX files to C:\windows\PolicyDefinitions
GPO settings below are just a recommendation, Please review and pick  ones that apply to you.

1. Computer Configuration/Administrative Templates/Microsoft Office 2016 (Machine)/Updates
   Enable Automatic Updates > Disable
2. User Configuration/Administrative Templates/Microsoft Office 2016/First Run
   Disable First Run Movie > Enable
   Disable Office First Run on application boot > Enable
3. User Configuration/Administrative Templates/Microsoft Office 2016/Miscellaneous
   Block signing into Office > Enabled
   Do not use hardware graphics acceleration > Enabled
   Show OneDrive Sign In > Disabled
   Suppress recommended settings dialog > Enabled
4. User Configuration/Administrative Templates/Microsoft Office 2016/Privacy/Trust Center
   Allow including screenshot with Office Feedback > Disabled
   Automatically receive small updates to improve reliability > Disabled
   Disable Opt-in Wizard on first run > Enabled
   Enable Customer Experience Improvement Program > Disabled
   Send Office Feedback > Disabled
   Send personal information > Disabled
5. User Configuration/Administrative Templates/Microsoft Office 2016/Security Settings/Trust Center/Trusted Catalogs
   Block the Office Store > Enabled
6. User Configuration/Administrative Templates/Microsoft Outlook 2016/Account Settings/Exchange
   Automatically configure profile based on Active Directory Primary SMTP address > Enabled
7. User Configuration/Administrative Templates/Microsoft Outlook 2016/Account Settings/Exchange/Cached Exchange Mode
   Use Cached Exchange Mode for new and existing Outlook profiles > Disabled
8. User Configuration/Administrative Templates/Microsoft Outlook 2016/Outlook Options/Other
   Hide the Office Store button > Enabled
9. User Configuration/Administrative Templates/Microsoft Outlook 2016/Outlook Options/Preferences/Search Options
   Prevent installation prompts when Windows Desktop Search component is not present > Enabled
10. GPO Reg preferences (Optional), this hides the search disabled warning
    HKCU:\Software\Microsoft\Office\16.0\Outlook\Options\General
    PONT_STRING=53,

Stop the install prompts when loading outlook

1. Add-WindowsFeature -Name Search-Service
2. Stop-Service -Name WSEARCH
3. Set-Service -Name WSearch -StartupType Disabled