Ad hoc access to OLE DB provider 'Microsoft.ACE.OLEDB.12.0' has been denied. You must access this provider through a linked server.

--Ad Hoc Distributed Queries 
USE [master] 
GO 
EXEC master.dbo.sp_MSset_oledb_prop N‘Microsoft.ACE.OLEDB.12.0‘, N‘AllowInProcess‘, 1 
GO 
EXEC master.dbo.sp_MSset_oledb_prop N‘Microsoft.ACE.OLEDB.12.0‘, N‘DynamicParameters‘, 1 
GO

原文：https://www.cnblogs.com/ls11736/p/15151371.html