We open port 1239 at the customer site for our external ip.
We have a sharepoint site where we insert web part and publish widget of the backup status for the customers.
For some of the customers the widget just display blank. If we open the widget in a standalone tab and insert the url into the bowler it shows correctly.
Cant see why this occurs since all the customers hardare and setup is 100% identical.
This is a sharepoint 2013 internal site.
Anyone seen this behavior?