Thx, Kelly
The proxy setting in IE 9 is set up and controlled by the corporate Internet security personnel (not by workstation users). The proxy server is running fine.
Kelly,
Do you think it would be fine for IE 9 (Print widget), if we request IT to remove the restriction on ArcGIS Online from the company proxy server? If so, what kind of specific justifications (related to the Print widget from Web AppBuilder in ArcGIS Online) should be provided to Internet security to take actions?
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It looks that: when the same proxy is applied onto IE 11, the Print widget works; but not works for IE 9…
Do anyone else have same scenario?