InfoPath 2010 submit error

I am facing an issue when submitting a开发者_如何学编程n InfoPath form to a SharePoint forms library, I have 2 WFE servers with NLB, using HTTP for intranet(for local users) and the web application is available through the internet using HTTPS when submitting the form the local server using HTTP its working fine, but when accessing SharePoint externally through https I'm getting the below-warning message and I can't submit the form since I have "Try Again" and "Exit Form"

Warning

The form cannot be submitted to the Web server either because your computer is offline or because the host server is currently unavailable. If this problem persists, contact your network administrator.

For my case with 2 WFE servers , the Resolution was as the below:

1- configure AAM and insure that (http://) is mapped to (https://).

2- Installed a self-signed certificate on WFE1 IIS.

3- Export the Self-Signed certificate from IIS and add it to SharePoint Trust relationships (http:///_admin/ManageTrust.aspx)

5- restart IIS.

6- Import the same certificate to WFE2's IIS and restart IIS for WFE2.

This problem usually occurs if the current page has been hosted within a secure HTTPS environment. Meanwhile, it embeds unsecured HTTP contents/scripts

For SharePoint 2013 / 2010 you can also check this details article.

The form cannot be submitted to the web server either because your computer is offline or because the host server is currently unavailable. If this problem persists, contact your network administrator