will mail merge email show in my sent box

Hi Gerda,

Are there any update from you? If yes, please feel free to let us know. Kind regards, 
Hoang-D - MSFT | Microsoft Community Support Specialist.

Hi Gerda, Thank you for reaching out to Microsoft Community. We are happy to help with your concern.Up to now, emails sent via Word Mail Merge using Outlook do not appear in the Sent folder by default. This is a known limitation of Microsoft unless you use a macro or third-party add-in to force saving them. If you want to check whether your Mail merge is sent, we suggest you

• Third-party tools: use a third-party mail merge tool that integrates with Outlook and logs sent emails
• Check with your IT Department: you can contact your IT Department to ask for emails logs that confirm the sending and delivery status of the merge mails.
• Test with Fewer Recipients: For future mail merges, consider testing with a smaller number of recipients first. This can help ensure that everything is functioning correctly before sending it to a larger list.
• Enable Tracking Options:  if you want to receive notifications for future mail merges, in Word, before sending the emails, go to Mailings > Finish & Merge> Send Email Messages> ensure you select the option to receive a copy of the emails sent. Then you could check the receipt confirmation for verification.

I hope this information is helpful. Please don’t hesitate to reach out again if you need further assistance. Best Regards,  

Hoang-D - MSFT | Microsoft Community Support Specialist