OpenQuery Update Linked Server
UPDATE OPENQUERY(NMIIFLIB, 'select * from MVXCDTANSN.MITMAS where MMITTY = ''25''')
SET MMDWNO = 21
Code with bulbul
UPDATE OPENQUERY(NMIIFLIB, 'select * from MVXCDTANSN.MITMAS where MMITTY = ''25''')
SET MMDWNO = 21