The vendor has published 2 unique mention(s) for this bug: 1. The Windows OS option is not listed in the Expression Editor drop-down list for pre-authentication policies and authentication actions on the NetScaler GUI. However, if you have already configured the Widows OS scan on a previous NetScaler build using the GUI or the CLI, the upgrade does not impact the functionality. You can use the CLI to make changes, if required. Workaround: Use the CLI commands for the configuration. To configure advanced EPA action in nFactor authentication, use the following command. add authentication epaAction adv_win_scan -csecexpr "sys.client_expr(\"sys_0_WIN-OS_NAME_anyof_WIN-10 [COMMENT: Windows OS] \")" To configure a classic pre-authentication action, use the following commands. add aaa preauthenticationaction win_scan_action ALLOW add aaa preauthenticationpolicy win_scan_policy "CLIENT.SYSTEM(\'WIN-OS_NAME_anyof_WIN-10 [COMMENT: Windows OS] \') EXISTS" win_scan_action 2. The Windows OS option is not listed in the Expression Editor drop-down list for pre-authentication policies and authentication actions on the Citrix ADC GUI. However, if you have already configured the Widows OS scan on a previous Citrix ADC build using the GUI or the CLI, the upgrade does not impact the functionality. You can use the CLI to make changes, if required. Workaround: Use the CLI commands for the configuration. To configure advanced EPA action in nFactor authentication, use the following command. add authentication epaAction adv_win_scan -csecexpr "sys.client_expr(\"sys_0_WIN-OS_NAME_anyof_WIN-10 [COMMENT: Windows OS] \")" To configure a classic pre-authentication action, use the following commands. add aaa preauthenticationaction win_scan_action ALLOW add aaa preauthenticationpolicy win_scan_policy "CLIENT.SYSTEM(\'WIN-OS_NAME_anyof_WIN-10 [COMMENT: Windows OS] \') EXISTS" win_scan_action Modules: 1. Citrix Gateway 2. NetScaler Gateway Latest urls for this bug: 1. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=41.28 2. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=47.24 3. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=52.24 4. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=58.32 5. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=61.48 6. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=64.35 7. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=67.43 8. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=71.44 9. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=89.7 10. https://docs.netscaler.com/en-us/updates?product=NetScaler%20ADC%20%28includes%20NetScaler%20Gateway%29&version=13.0&build=90.12