It looks like you’re referencing a specific filename for an older Sophos VPN client:
sophosconnect_2.5.0_ga(ipsec_and_sslvpn).msi
Here’s what that indicates:
For remote domain joins, Sophos Connect 2.5.0 supports machine tunnels via IKEv2. Install the MSI with:
msiexec /i "sophosconnect 2.5.0 ga(ipsec and sslvpn).msi" MACHINE_TUNNEL_ENABLED=1 /qn
The tunnel establishes before Windows logon. sophosconnect 2.5.0 ga%28ipsec and sslvpn%29.msi
Once the MSI is installed, the user has two ways to connect.
Deploy via GPO, SCCM, Intune, or script: It looks like you’re referencing a specific filename
msiexec /i "SophosConnect_2.5.0_GA_(IPsec_and_SSLVPN).msi" /quiet /norestart
Uninstall silently:
msiexec /x ProductCode /quiet
Even GA software has quirks. Here are the top three issues admins face with this specific build: Product: Sophos Connect VPN client Version: 2