A company adds a user to Microsoft 365.

When a new user is added to Microsoft 365, the steps to provision them in Dynamics 365 Business Central are:

Get New Users from Microsoft 365 / Update Users from Microsoft 365

Synchronizes new Azure AD/Microsoft 365 users into Business Central.

Select the user from the user list

The user will appear in the Business Central user list after synchronization.

Create a user group

Since existing user groups do not have the required permission sets, a new user group must be created with the appropriate permission sets.

Assign the user group to the user

This links the user to the new user group, thereby granting the proper permissions.

Assign the company to the user

Finally, specify which company (database/company within Business Central) the user can access.

Microsoft Learn References

Manage Users and Permissions

Create and Manage User Groups

Add Users from Microsoft 365