Hi @tom geo ,
Check in the URL (once you click on excel) whether the format is EXCELOPENXML/WORDOPENXML. If yes change it to EXCEL/WORD.
Or you could open rsreportserver.config file and enable EXCELOPENXML format, WORDOPENXML. format, Excel, Word format. Look for the Render section, enable or disable the export formats that you want your users to have access to, as shown in the figure below:
2017 and newer version rsreportserver.config path: C:\Program Files\Microsoft SQL Server Reporting Services\SSRS\ReportServe
Best Regards,
Joy
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