External ID is a native workspace profile field that can be used as a reference identifier for the workspace in another, external system.
Note: Compare to Dynamic Application External ID.
When a workspace is created in PPM, the workspace External ID field is blank.
If the workspace is linked to a workspace outside of PPM, the External ID may be programmatically updated with a value from the external system (it does not have to be updated).
If External ID has been set, either programmatically or from within PPM, the current value displays.
In PPM, a project manager or administrator can edit the workspace profile to change the External ID. If the field contains a value (it is not blank), that value must be unique within an enterprise.
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