Overview

Number sequences in D365 F&O are automated systems that generate unique, readable IDs for records like invoices, purchase orders, or customers. Microsoft describes them as tools creating sequential identifiers (e.g., INV-00001, INV-00002) for master data and transactions, ensuring easy tracking without manual entry errors.

Configuration

Path: Organisation administration > Number sequences > Number sequences

On the action pane, click Number sequence under the head New

On the new page, enter Number sequence code and Name for identification purpose

We can change the scope parameters as legal entity, operating unit and some other options also.

Scope Shared meansitcan be shared with other legal entities also and the number sequences will be global. Here in this scope, we can set it specifically to a Legal entity where that number sequence will only be used by that entity.

The number sequence can be segmented as constant and alphanumeric. Constant value such as an entity code, number sequence code can be added as a prefix or suffix to the sequence. It can be done in the option Segments.

References option link to specific forms (e.g., Sales Order) so IDs auto-populate.

In the fast tab General setup, it can be set as manual entry or as a continuous sequence. If you want to stop its usage it can be enabled through the toggle Stopped.

Preallocation function grabs a batch of numbers ahead of time (e.g., 10 IDs) and stores them in memory or database, so the system issues them quickly without hitting the database every single time.