** Shares of Australia's Data#3 DTL.AX fall as much as 13.1% to A$6.45

** Stock hits lowest since August 2023

** The IT solutions provider announced major changes to its tie-up with Microsoft MSFT.O late Monday

** DTL said the changes under the partnership would reduce the incentives earned on its enterprise agreements with the tech giant

** Stock has fallen 12.1% this year, as of last close

(Reporting by Rishav Chatterjee in Bengaluru)

((Rishav.Chatterjee@thomsonreuters.com))