Clients Captive Portal Certificate Error

Question

Dears, 
 
 Users when they are accessing the Captive Portal ( Web Authentication ) , there was Certificate Error "Not Secure " ,how to solve this certificate error any ?, I followed with some steps but still same issue anyone have the Video with more details please ?

All the best

Raphael Alganes · Answer

Hello Ahmed, 
 
 Thanks for reaching out to Sophos Community and hope you are well. 
 
 May I confirm if this is the KB guide you are following: https://support.sophos.com/support/s/article/KB-000033587?language=en_US 
 This is caused by the self signed certificate of SWA not being trusted by the machine's browser. 
 
 Thanks for your time and patience and thank you for choosing Sophos. 
 
 Cheers,