Dell ThinOS 2211, 2208, and 2205 Release Notes

Updates to Admin Policy Tool and Wyse Management Suite policy settings

1. WINS Server —Added new option WINS Server in Network Configuration > DNS Settings. If you disable Only use DNS configuration set in DHCP, you can set WINS Server
   NOTE:ThinOS only supports one WINS server.
2. SNMP Server List—Added a new option SNMP Server List in Network Configuration > SNMPV3 Settings. You can set four SNMP servers.
   • If you leave this option blank, any SNMP server can access ThinOS.
   • If you set the SNMP server, only the SNMP servers in the list can access ThinOS.
3. TLS Control—Added new options TLS Min Protocol, TLS Max Protocol, and Select Ciphers to disable in Privacy & Security > Security Policy. These options require a reboot to take effect.
   • If you select the minimum TLS version in TLS Min Protocol and maximum TLS version in TLS Max Protocol, ThinOS uses the TLS versions in the scope for connection.
     NOTE:With the next release, TLS 1.0 and 1.1 are going to be removed.
     If you select the TLS ciphers in Select Ciphers to disable, ThinOS does not use these ciphers for connection.
   • Wired and wireless authentication ignores the TLS control settings. Authentication servers decide the TLS versions and ciphers.
     NOTE:In the next release, wired and wireless authentication is going to follow TLS control settings. Ensure that your wired and wireless environment support TLS 1.2.
   • Wyse Management Suite server connection ignores the TLS control settings. Wyse Management Suite servers decide the TLS versions and ciphers.
   • Imprivata OneSign ProveID Embedded ignores the TLS control settings. OneSign servers decide the TLS versions and ciphers.
   • Identity Automation ignores the TLS control settings. HealthCast Lynx servers decide the TLS versions and ciphers.
   • Web browser login always uses TLS 1.2 version or later.
   • If the TLS version in TLS Max Protocol is lower than TLS Min Protocol, after saving, the new values revert to the original values.
4. Reason For RDP/AVD Session Disconnect is displayed—The default value is Enable in Session Settings > RDP and AVD Session Settings. When an RDP/AVD session gets disconnected, a dialog box displays the reason for disconnection. This dialog box stops the session auto reconnect process, so disable this feature if you prefer to auto reconnect to the session.
5. Hide Taskbar—Added a new option Hide Taskbar in Personalization > User Experience Settings > System Mode. This option is for classic mode only. If you enable this option, the taskbar at the bottom is hidden when ThinOS is not logged in or if you try to maximize a window. You can move the mouse cursor to the bottom to show the taskbar.
   NOTE:This option is designed for seamless use of the application. If you are using the desktop in full screen mode, it is recommended to disable it. Otherwise, when you move the mouse cursor to the bottom, ThinOS taskbar covers the Windows desktop taskbar.
6. Manual Override for Closing the Lid—Added a new option Manual Override in System Settings > Power Sleep Settings > Closing the Lid (MTC only). When the option is enabled, you can change the value of When I close the lid on the ThinOS client by going to System Preferences > Power and Sleep. After that, the ThinOS client does not apply the policy of Closing the Lid from Wyse Management Suite anymore.
7. Manual Override Login Settings — Added Manual Override Login Settings in Advanced > Login Experience > Login Settings > Default Credentials. By default, the option is disabled.
   • If Manual Override is disabled, the settings in Advanced > Login Experience > Login Settings > Default Credentials from Wyse Management Suit take priority.
   • If Manual Override is enabled, Manual Override Policy is displayed and by default, it is By group. Another option is By parameters. When Manual Override Policy is enabled, the changes of local default credentials in Remote Connections > General Options takes priority.
     • If Manual Override is enabled By group and local default credentials are changed, all the policy changes made in WMS > Advanced > Login Experience > Login Settings > Default Credentials are prevented.
     • If Manual Override is enabled By parameters and local default credentials are changed, only the conflicting settings in Advanced > Login Experience > Login Settings > Default Credentials from Wyse Management Suite server are prevented.
8. UC Virtual Channel settings— Unified Communication Virtual Channel Settings are added in Citrix Session Settings, Blast Session Settings, and RDP and AVD Session Settings.
   • UC Virtual Channel settings in Citrix Session Settings
     NOTE: The UC Virtual Channel settings do not apply to ThinOS versions later than 9.1.2101 but earlier than or equal to 2208 (9.3.2102). These settings are supported again from ThinOS 2211 and later. From ThinOS 2211, the default values of all UC virtual channel settings have been changed to Enabled.
     NOTE:When the UC virtual channels are disabled, the Unified Communication software on ThinOS uses the fallback mode, which uses the HDX webcam and HDX audio. Using the fallback mode consumes more remote desktop resources such as CPU, GPU, RAM, and Network.
     NOTE:Enabling or disabling the UC plug-in settings in VDI Configuration Editor > Citrix Configuration Editor is deprecated from ThinOS 2211.

     For ThinOS 9.1.2101 or earlier versions, see ThinOS 9.1 Administrator's Guide at www.dell.com/support on the number of allowed virtual channels and tested combinations of Unified Communication optimizations.

     1. On the ThinOS client, open Admin Policy Tool, or go to the ThinOS 9.x policy settings in Wyse Management Suite.
     2. In the Advanced tab, expand Session Settings, and click Citrix Session Settings.
     3. In the UC Virtual Channel Settings section, enable or disable one or more Unified Communications (UC) virtual channels as per your preference. The available options are:
        • Microsoft Teams Optimization
        • HDX RealTime Media Engine for Microsoft Skype for Business
        • Zoom Meetings Optimization
        • Cisco Jabber Softphone for VDI (JVDI)
        • Cisco Webex Meetings for VDI
        • Cisco Webex VDI (formerly Cisco Webex Teams)
     4. Sign out or restart the device for the settings to take effect.
     The following UC virtual channels labels are renamed in ThinOS 2211 Admin Policy Tool and Wyse Management Suite version 4.0 using the Configuration UI package vxxxxx:

     • RTME for Skype for Business is renamed to HDX RealTime Media Engine for Microsoft Skype for Business.
     • JVDI for Cisco Jabber is renamed to Cisco Jabber Softphone for VDI (JVDI).
     • Cisco Webex Meetings for VDI is renamed to Cisco Webex Meetings for VDI.
     • Cisco Webex Teams for VDI is renamed to Cisco Webex VDI (formerly Cisco Webex Teams).
   • UC Virtual Channel settings in Blast Session Settings
     1. On the ThinOS client, open Admin Policy Tool, or go to the ThinOS 9.x policy settings in Wyse Management Suite.
     2. In the Advanced tab, expand Session Settings, and click Blast Session Settings.
     3. In the UC Virtual Channel Settings section, enable or disable one or more Unified Communications (UC) virtual channels as per your preference. The available options are:
        • Microsoft Teams Optimization
        • VMware Virtualization Pack for Skype for Business
        • Zoom Meetings Optimization
        • Cisco Jabber Softphone for VDI (JVDI)
        • Cisco Webex Meetings for VDI
        • Cisco Webex VDI (formerly Cisco Webex Teams)
     4. Sign out or restart the device for the settings to take effect.
   • UC Virtual Channel settings in RDP and AVD Session Settings
     1. On the ThinOS client, open Admin Policy Tool, or go to the ThinOS 9.x policy settings in Wyse Management Suite.
     2. In the Advanced tab, expand Session Settings, and click RDP and AVD Session Settings.
     3. In the UC Virtual Channel Settings section, enable or disable one or more Unified Communications (UC) virtual channels as per your preference. Zoom Meetings Optimization is the only available optimization.
     4. Sign out or restart the device for the settings to take effect.
        NOTE:It is recommended that the UC Virtual Channel Settings be kept as Enabled. From ThinOS 2211 onwards, if you disable the UC Virtual Channel Setting, the UC fallback mode is used. The video and audio quality degrades, and the system performance is affected.
9. Supports showing pictures from File Server option—You can configure this option in WMS/APT > Personalization > Screen Saver Settings > Showing Pictures > File Server option. If File server option is enabled, the client can download the screensaver images from the IIS file server.

   The option supports only HTTPS protocol. File server option also supports anonymous authentication and basic authentication on the IIS server.

   NOTE:The file server timer is the time taken to sync the file between client and server timer. Before the sync happens, the screen saver uses the last saved pictures or the default picture. After the sync happens, the screen saver applies the new pictures next time.

   If the Enable CA validation option is enabled, the URL must be used with a fully qualified domain name (FQDN) and not IP. The URL must also use a domain signed certificate only.

10. Supports enabling LPD Service setting in printer—To configure this setting go to WMS/APT > Peripheral Management > Printer > Local Printer Settings and SMB Printer Settings > Enable LPD Service.
    If enabled, the client can be configured to provide Line Printer Daemon (LPD ) services, that is, the client can work as a printer server on the network.

    NOTE:LPD service for LPT and SMB is not supported in AVD/RDP sessions.
11. Enable Group Change Notice—Added Enable Group Change Notice in Services > WDA Settings. If this option is enabled, a dialog box is not displayed when changing the group on the thin client.
12. Enable Performance Retrospective— Added Enable Performance Retrospective in APT/WMS > Advanced > Services > Troubleshooting Settings. By default, the option is disabled. When enabled, you must first specify the device for performance retrospective and the Performance Retrospective button, which is in Troubleshooting window of the General tab can be enabled.