> ## Documentation Index
> Fetch the complete documentation index at: https://docs.conversion.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Called by Another Workflow

> Trigger a workflow when it is called from another workflow.

The **Called by another workflow** trigger marks a workflow as callable from other workflows. This workflow only runs when another workflow explicitly calls it.

## Configuration

This trigger has no additional configuration fields. Choosing it simply makes the workflow available as a target for one or more other workflows to call.

## Re-enrollment

By default, contacts can only enter the workflow once. When you enable re-enrollment, contacts can enter the workflow each time it is called by another workflow, the same behavior as [event-based triggers](/product-docs/workflows/triggers/event-based).

## Exit conditions

Exit conditions define when a contact should leave the workflow early, regardless of where they are in the sequence. You configure exit conditions using the [Unified Query Engine](/product-docs/unified-query-engine/overview).