Send invitations to participants

Participant’s invitation page

When you add invitation codes, you’ll notice there’s also a link that is generated. This link is meant to be sent to the participant to help them get started with the app. You can click the link yourself if you want to know what the page looks like for the participant. This page also includes the personal invitation code for the partcipant.

In the next clip we give a small demo for this page:

As mentioned in the clip, you can personalize this page by changing the logo, title and welcome text. This is not mandatory, but if you want to change it, here is where you can do it:

  1. Settings
  2. Auto enroll
  3. Default onboarding page.

Then you’ll see the fields to fill in your information for the participants.

How to send a bulk e-mail with Excel and Outlook in 5 easy steps!

It can be quite cumbersome and repetitive work to send the same mail but with different code and link to all participants. So here we’ll explain how you can set up an e-mail to send to all participants in a list.

Why use bulk?

It seems daunting at first, as there are a number of steps to follow. But once you’ve done it once, it will be so much quicker and efficient. Sending individual mails is very error prone and cumbersome. After testing it ourselves, we assume that the average person will take 6 times less time to send it by bulk than to manually send every mail.

ManuallyBulk
Estimated time to send mails to 100 participants (incl. generating the codes and putting the mailaddresses in the exported file and writing an e-mail)Image showing six clocks with each 30 minutes highlighted in blue. And a text that says "3 hours"This image shows a clock that has highlighted 30 minutes in blue. And a text that says "30 minutes"
Chance you mess up one of the invitation codes or linksLikely (and this will add time too to rectify the mistakes!)Very unlikely

We promise that the steps are easy to follow!

0. What you’ll need

Here’s a list of what you’ll need, so you know upfront if you have everything to accomplish this:

  1. Microsoft Excel
  2. Microsoft Word (that uses the same account as your Outlook)
  3. Outlook Classic on your desktop (It has to be Classic, the new Outlook doesn’t allow you to do bulk e-mail (yet?)). Outlook needs to be opened during the sending of the mails, but you actually won’t really need to do anything in here. But if the app isn’t open, it won’t send mails.
Screenshot showing that when you search for Outlook on your laptop, and then choose the one that says "Outlook (classic)" and not just only "Outlook".

1. Add invitation codes

We already have a page dedicated on how to generate invitation codes and export them. So if you’ve never done that before, go and take a look there. Make sure you remember where you saved the downloaded file so you can find it back for the following steps.

2. Add mail addresses to the Excel file

Open your exported .csv file in Excel.

Save the file as .xlsx (Microsoft Excel-worksheet/ Excel Workbook). There is a chance Excel will already give you a warning about this:

Screenshot of a warning in Excel that reads: "POSSIBLE DATA LOSS: Some features might be lost if you save this workbook in the comma-delimited (.csv) format. To preserve these features, save it in an Excel file format." There are two buttons: "Don't show again" and "Save As...".

So click on “Save As…” (or if you don’t get the warning, click on “File” on the top left and then on “Save As“). Choose Excel Workbook as new type of your file (this will result in .xlsx file extension) and click on Save. Now the warning should be gone. And your file has now to correct extension to use later.

Screenshot of Windows Explorer screen. Focus is on "Save as type" which has value: "Excel Workbook".

In the file you’ll notice it already has some columns. But we don’t handle email addresses for privacy reasons, so that’s something you must add. In the next empty column you write “mail” in the top cell and fill the column with all the mail addresses of the participants (don’t forget to add the header “mail” (or something similar), because you’ll need to reference this header later on). If you want to, you can also add the names of the participants or other info that you want to use.

A screenshot of an excel sheet with 6 colums: legacyCode, code, link, used, invitationTemplate and mail. Each column has 10 rows with fake example data.

Make sure to save your file after you finished making changes AND close your file because otherwise Word will not be allowed to use this file.

3. Set up Word for mailing

Open a new Word document. First we have to tell Word that we want to make a mail message and we do that by clicking on the following:

  1. Mailings Tab
  2. Start Mail Merge
  3. E-mail Messages
This is a screenshot of Word that shows that you have to click first on "Mailings" tab (you can see that all options of the Mailings tab are visible), secondly on "Start Mail Merge", a dropdown goes open, and finally you click on "Email Messages" in that dropdown.

Then we want to add the mail list to it so we can use it. (Make sure your Excel file is closed).

  1. Stay in the Mailings tab
  2. Select Recipients
  3. In the dropdown, choose “Use an Existing List
  4. Choose the list we made earlier (if you didn’t change the name it would be code.xlsx)
Screenshot showing that you first have to click on "Mailings", second on "Select Recipients", that then a dropdown occurs where you have to finally click on "Use an Existing List..."

Now you’ll get a window asking to select the table. Make sure you check “First row of data contains column headers“, this will make it easier later. Then click “OK“.

Screenshot showing the window "Select Table", with one table "code$" selected and the box "First row of data contains column headers" also selected.

4. Writing the mail

Now it’s finally time to write the mail you want to send to your participants!

We made a small example, but you can of course make the mail as long or as short as you want and provide the participants with as much information as required:

Dear participant

Thanks for participating in our research!

To make sure we can link your data with the correct account, we ask you to use the following code when you add a researcher in the app:

The full explanation on how to download the app and how to get started, you can find here:

If you have any questions, feel free to contact us!

Kind regards

Then we are ready to add in the magic, we are going to fill the information from your Excel in the document.

  1. First make sure you have your cursor in the place where you want the information to appear. So for example, put your cursor on the place where you want to invitation code to appear.
  2. Then make sure you are in the Mailings tab, then click on “Insert Merge Field” (you can find it in the “Write & Insert Fields” group). If it’s greyed out or you don’t get a list, go back to step 3 and try that again.
  3. You should now be able to choose “code“.
Screenshot showing the cursor being put at the position right after "add a researcher in the app: ". "Insert Merge Field" dropdown is opened and "code" is selected.

When you clicked on “code” something like this should appear in the document <<code>>. This means that on that place in the document, it will fill in the code of the corresponding row in the excel. Do the same thing for other fields you want to use.

Screenshot of the example mail and you see <<code>> and <<link>> on the places where you would add the invitation code and the link to the page.

When all the fields you want to use are added, it’s good to check if everything goes according to plan, so let’s check if the message looks as desired. Make sure you’re still in the Mailings tab. Then choose ”Preview results” and again on “Preview results” in the dropdown (if you are on a smaller screen). Now you get to see an example of the first row. Make sure this it looks to your liking. You can click then again on “Preview results” to see your settings again.

Screenshot of the example mail, now instead of <<code>> and <<link>> there is a real code and a real link from the example excel.

5. Sending the mails out

Now we are ready to send the mails out to the participants.

Firstly, make sure you have the Outlook Desktop app open (Word will use this to send the mails).

Then, back in Word, we stay in the tab Mailings, then click on “Finish & Merge” and in the dropdown that opens you click on “Send Email Messages…“.

Screenshot where 3 fields have a border around and have numbers from 1 to 3. 1 is the Mailings tab. 2 is Finish & Merge (and you can see that that dropdown is open). 3 "Send Email Messages..." is the last border.

Next a window with “Merge to E-mail” will open.

  1. Click on the dropdown after the “To:” to choose the column you’ve created in the first step with the mailaddresses (there is a good chance that Word has already chosen the correct field for you).
  2. Fill in a subject for your mail after the “Subject line“.
  3. For Email format choose “Plain text“.
  4. Choose All records (but you could first try “Current record” to test if it works or certain records if you don’t need all the records.
  5. Click “OK”
Screenshots that shows where to find all the steps

Your done!

6. Last check

To make sure everything went occording to plan. Go to Outlook and click on “Sent Items”. You should find your mails there within 5 minutes. Then you’re sure the mails were send out.

Updated on May 15, 2025

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