Step-by-step guide for setup user in Business Central
1) Add users and assign licenses in the Microsoft 365 Admin Centre
2) Login to Business Central, enter "Users" in search button and the select the related link
3) Click the action button "Update Users from Microsoft 365"
4) Assign Permission Set to the user
Option 1 - Select "Permission Set by User" in action menu Related => Permissions => Permission Set by User, then select permission set to the user.
Option 2 - Assign Permission Set to the User Security Groups