Thanks meaton. I have not cerated provisining profile after adding NetworkExtension capability for my container application and extension. That time I have used Automatic signing and xcode creates provisning profile for me but now when I have tried to codesign the applications with Developer id application certificate it gives me profile related error. Do I need to create new profile for both applications?

Did you found any solution for this issue? I have come across same issue on 10.15.6 os. Is it possible to keep both Network extension and endpoint security extension in same container app?

Not the same extension, but you can package an NE sysex and a ES sysex in the same container app. Ok. so I need to activate both the extensions at the installation time. it will become little bit complex, but I will try this solution as there are no other option exist.

@eskimo Thanks for reply. Can I use NetworkExtension and EndPointSecurity in same system extension?

@EsKimo: Thanks for reply. I have cerated bundle ID for app and added "Network Extension" capability for that bundle id using the developer web site. Now here are my questions: Can I use NetworkExtension and EndPointSecurity in same system extension. Do I need to add EndPointSecurity capability in Apple web site? I have not found EndPointSecurity capability option in capability list at "Certificates, Identifiers & Profiles >> All Identifiers >> Review your App ID Configuration" Is this because my role is Developer? 3. Do I need addition step to use EndPointSecurity Api's? According to https://developer.apple.com/system-extensions/ this link, to use the EndpointSecurity API, I’ll need to request an entitlement from Apple. Is this step mandatory?