How do I use tokens / personalize the subject line?

You can personalize the subject line with tokens from your Excel by typing the column name manually and surrounding it with two brackets on each side.

Example: Subject: "Trying to get in touch with {{Name}}"

If you don't want to type it, you can use the drop-down field to insert a token in the body and then just cut and paste from the body to the subject line. 

Use the Preview feature to see if you typed the column name correctly!

(Unfortunately we cannot insert them via the drop-down at the moment for technical reasons, but are constantly reviewing the capabilities of Microsoft 365 to see if this will be possible in future.)