- Staff user at LTU.
- Skype for Business is installed on your computer.
- You know the email address of the external contact you want to add.
- Open Skype for Business
- Paste the contact's email address in the search box
- The search results are displayed
- If you find the contact you are looking for, right-click it and select Add to Contacts and select a group that your contact will be included in.