How to open Thread for Email add-in?
Desktop Outlook
Select any email in Outlook and then click on Thread for Email add-in at the top right corner in your Outlook toolbar.
The add-in will open on the right side, click Sign in to login with your Microsoft account.
If you want to keep the add-in on the side for any email you open, use the Pin icon:
Outlook on the Web
If you are using Outlook on the browser, select any email and click on Apps for more options where you can select Thread for Email.
The add-in will open on the right side, click Sign in to login with your Microsoft account.
If you want to keep the add-in on the side for any email you open, use the Pin icon:
To find out more about Outlook add-in functionalities, go to Thread For Email Outlook Add In.