Outlook 365: Display full email address of senders and recipients within organization

Similar to this question about Outlook 2016, but for Outlook 365 (aka Microsoft 365 Apps for enterprise).

I have successfully used this formula to display the sender's email address if they are outside of my organization. However, I don't have a way to display the email addresses of senders or recipients who are in my organization. I want to see everyone's email address without having to open the full headers of each message. Thank you!

1 Answer

To add a full-email field:

• Click View > Add Columns

• In the Show Columns dialog do the following:

  • Click New Column button

  • In the New Column dialog specify a name for the new column

  • Choose "Formula" for "Type"

  • Paste this formula into the "Formula" box

    IIf(InStr([SearchFromEmail], "@") = 0, "", Left([SearchFromEmail], InStr([SearchFromEmail], "@") - 1)+"@"+Mid([SearchFromEmail],InStr([SearchFromEmail],"@")+1)). 

• Click OK to return to the "Show Columns" dialog

• Select the new column and move its place in the list

• Click OK to close this dialog.

The senders full email addresses will now be displayed in the mailing list.

Source: How to always show full email address in mailing list?