Scale of export is wrong, omitting scale-restricted layers

[KatyAppleton1]

I have a Layout with one Map Frame; this contains only a WMS which is limited to display between 1:4724 and 1:18,897.

My Map Frame is set to 1:10,000 in Properties > Display Options > Location Settings. This falls within the acceptable scales and I can see the WMS clearly on the Layout tab.

When I run Export Layout (to PNG, 300dpi), the WMS content does not show in the output, just the text "This dataset is only viewable at the scales between 1:4724 and 1:18,897. You requested the layer at 1:3,200."

I need to export my layout at 1:10,000 with the data visible as expected. Where is 3,200 coming from?

Further: I added a locally-stored image layer and set the scale visibility to be the same min and max values. This also shows the same issue on export, and the layer is not visible. So this is not confined to the WMS but seems to be an issue with exporting.

How can I get my export at 1:10,000?
As my desired layer is a WMS I cannot alter its scale restrictions, so I need to fix the export scale.

(ArcGIS Pro 3.4 on Windows 11)

[KatyAppleton1 · Accepted solution]

Lowering the DPI of the exported image resolves the issue. UK Support explained:

Reducing the DPI (e.g. from 300 to 96 or 150), you’re telling ArcGIS Pro to use fewer pixels per inch, which:

• Lowers the effective zoom level
• Brings the requested scale back into the valid range 

This aligns the export scale with what you see in Layout View, allowing the WMS to render correctly.

I still find this difficult to understand in terms of why the software behaves like this, but at least there is a way to export my map. For my specific use, an export at 150dpi was fine (300dpi was simply the original default).