A supplier will be made inactive automatically if no order has been sent them in the past 120 days, or no invoices from this supplier has been uploaded for the past 30 days. This helps you to keep your ordering list short and relevant, and your supplier page manageable. Inactive suppliers will not be available in the drop-down bar for selection at the point of creating new orders. Only active suppliers are available for selection when creating new orders.
Active suppliers are indicated by a green status tab on your 'My Supplier' page.
Inactive suppliers are indicated by a greyed out tab on your 'My Supplier' page.
To make a supplier active again, simply go to My Supplier > Look for the relevant supplier > Click on the status tab.