https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1157982#M45133 <P>When trying to pull in .xlsx files error message "Failed to connect to database and underlying database error occurred class not registered".&nbsp; Windows 11 Pro</P> Fri, 25 Mar 2022 18:50:12 GMT TerryWhalen 2022-03-25T18:50:12Z https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1157982#M45133 <P>When trying to pull in .xlsx files error message "Failed to connect to database and underlying database error occurred class not registered".&nbsp; Windows 11 Pro</P> Fri, 25 Mar 2022 18:50:12 GMT https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1157982#M45133 TerryWhalen 2022-03-25T18:50:12Z https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1157991#M45134 <P>Are you getting this error in ArcGIS Online (since the thread is posted in ArcGIS Online space)?</P><P>In case it is ArcMap or ArcGIS Pro, let us know the version.</P> Fri, 25 Mar 2022 19:08:31 GMT https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1157991#M45134 JayantaPoddar 2022-03-25T19:08:31Z https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1294169#M52496 <P>I am having the same issue on Windows 10 ArcMap 10.8.2</P> Tue, 30 May 2023 18:02:21 GMT https://community.esri.com/t5/arcgis-online-questions/class-not-registered-error/m-p/1294169#M52496 DominiqueSullivanMarks 2023-05-30T18:02:21Z