Step 1. Click on the Add new member button on the top menu bar of the TeamsID Web Dashboard.
Step 2. Click on the link Add multiple members using csv and upload your csv.
Note: Click on the Download Sample link to correctly format your csv.
Step 3. You should see a little dialog box in the bottom right hand corner saying Users Invited Successfully!
Step 4. Have the invited users check for an email invitation with the subject line, Invitation: Please Activate Your TeamsID Account. They need to click the Accept Invitation link.