Add Guest User in Azure for Business Standard

Permanently deleted user

Open the Azure portal.
In the left pane, select Azure Active Directory.
Under Manage, select Users.
Select New guest user.
On the New user page, select Invite user and then add information about user.

Optionally, include a personal welcome message to the user to let them know that you are adding them to your Business Central.
Select Invite to automatically send the invitation. A notification appears in the upper right with the message Successfully invited user.
After you send the invitation, the user account is automatically added to the directory as a guest.

Next, you must assign the new guest user a license to Business Central.