1. Create a new business account.
2. Click Manage External Account and then, click Enable asPartner.
3. In the confirmation dialog, select Yes, I want to enable this account as aPartner Account..
4. Click Confirm.NoteIf your organization has person accounts, they cannot be used as partner accounts. Only business accounts can be used as partner accounts.Partner accounts can’t be deleted, but can be disabled.To enable a partner in Lightning Experience, add the Enable PartnerUser button to the Salesforce Mobile and Lightning ExperienceActions section on the Account and Contact page layouts.
5. If your organization has person accounts, they cannot be used as partner accounts. Only business accounts can be used as partner accounts.
6. Partner accounts can’t be deleted, but can be disabled.
7. To enable a partner in Lightning Experience, add the Enable PartnerUser button to the Salesforce Mobile and Lightning ExperienceActions section on the Account and Contact page layouts.