The remote server returned an error: (500) Internal Server Error.

Issue:

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When we see a 5566 error in the InfoPath form loading with a correalation ID and we see  (500) Internal Server Error in USL logs, we will have to check the belo mentioned settings on an OnPrem SharePoint farm

Steps:

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• Check the data connection time out in the central administration site and Set-SPInfoPathFormsService -MaxDataConnectionRoundTrip (refer : https://blogs.msdn.com/b/microsoft_infopath_bloggers/archive/2015/05/29/issue-with-infopath-data-connection-maxdataconnectionroundtrip-time-out.aspx)
• Check f5 load balancer settings and time out settings.
• We created new udcx file and published it to a data connection library in the same site collection, referring the blog : https://blogs.technet.com/b/rajbugga/archive/2013/08/07/infopath-over-claims-authentication-sharepoint-2010-amp-2013.aspx.
• There might be an issue with the Web service. Make sure you can browse to the web service from the browser on the server and from the client machine without any errors.

Published by: Menaka Sarkar B.