You can share your tasks with internal as well as external partners. Depending on the requirements, different methods exist.
To make a folder available for internal users or external partners, proceed as follows:
Create a new personal or public tasks folder.
You can also share an existing folder.
If another internal user shared a task folder with you, you can access this folder in the folder view.
To invite external partners to a task, proceed as follows:
When creating the task, add external partners as external participants.
Also see:
Parent topic: Tasks in teams