Hi,
As of now, the feature to turn off the notification window when using the Find/Replace feature in Word is not available.
However it may be possible doing through a VBA code (Macro) to automate the process. To know more on how to do so, you may post your query in
the Customization Community:
http://answers.microsoft.com/en-us/office/forum/customize
I hope the above information helps. If you need further assistance, you may reply and I’ll be happy to assist you.
Thank you