Windows 10/11, corporate firewall (SonicWall/Cisco/Fortinet), TeamViewer v15+

Here’s a structured post you can use for a forum, internal IT ticket, or social media help thread regarding Option 1: Forum / IT Support Post (e.g., Reddit, Spiceworks) Title: TeamViewer blocked by firewall – outbound connections failing

Unable to provide remote support to external clients / internal users working from home.