DATALINK you can insert a live content of Excel tables (or parts of them) to your AutoCAD drawing. On any subsequent change of the Excel table you will be notified by AutoCAD and you will have to update the DWG content manually (updates do not depend on the DXEVAL variable).
If you want to perform the update of Excel table data automatically, after you open your DWG drawing, you can use a simple LISP function. Find the file ACADDOC.LSP (by default in the local user Support folder) and add the following line using Notepad.exe:
(command "_DATALINKUPDATE" "_U" "_K")
If the file ACADDOC.LSP does not exist, create it.
Now after you open any drawing, its data links will be automatically updated.