Hi ..
I've created an excel webpart in sharepoint , importing the named range from the spreadsheet I've created.
The spreadsheet is saved on a trusted location.
The excel spreadsheet's pivot are created by pulling in data from sql server.

However when I try to refresh the data in the webpart, I get this error   "Unable to retrieve external data for the following connections..."

Do you perhaps know of a workaround this??
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The issue may be something to do with Alternate Access Mappings (AAM), please try to check your AAM configuration.

For more information about configuring Alternate Access Mappings
check this


Hope it helps

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