To my fellow SharePoint 2013 Engineers,
We've run into an interesting issue and wanted to get some advice to find a fix. As the title goes, custom list forms built using InfoPath Designer are giving the 5566 error. However, this only happens when we access the custom URL. If access the original servername URL then the form works like a charm. So here is some more information which includes the fixes we have tried plus our environment information-
1) We have four WFE servers which are load balanced hence we have added the 127.0.0.1 with site URL on the host file of each server.
2) We also added the DisableLoopbackCheck reg entry to the Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and set the value as 1 on each WFE server.
3) The custom URL which is used to access the sites is the default site on AAM.
4) The custom URL has been added to the IIS site's bindings.
5) On Central Administration>General Application Settings>InfoPath Forms Services, in the Configure InfoPath Forms Services Web Service Proxy, we enabled both the 'Enable InfoPath Forms Services Web service Proxy' and the 'Enable InfoPath Forms Services Web Service Proxy for user forms'
6) In Configure InfoPath Forms Services-
- Allow users to browser-enable form templates - Checked
- Render form templates that are browser-enabled by users - Checked
- Default data connection timeout : 50000
- Maximum data connection timeout: 90000
-Data connection response size - 60000
- Require SSL for HTPP authentication to data sources - unchecked
- Allow embedded SQL authentication - Unchecked
- Allow user form templates to use... - Checked
- Allow cross-domain data access for user... - Checked
- Number of postbacks per session: 75
- Number of actions per postback - 200
- Active sessions show be terminated after: 1440
- Maximum size of user data: 32768
I might have provided waaaaay more information than you need, but I'm hoping that someone can point me in the right direction. Thanks in advance