The Add Join tool with a one-to-one join operation does not complete the join in ArcGIS Pro, even though the operation is not case-sensitive

Solución alternativa

• Either create a new field to alter the join field to upper case or use the Calculate Field tool on the existing field to change all the information to upper case. 
• If altering the existing field, configure the Calculate Field tool with the following settings and expressions:
  • Input Table: Features targeted for alteration.
  • Field Name: The join field used to perform the join (In this example, the field is named Address).
  • Expression Type: Python.
  • Expression: Address = !Address!.upper()
  • Enable the Enable Undo toggle button.
  • Click Apply to confirm the field has changed to all upper case and click Run.
• Use the same workflow as above to create a new field. For the expression, use: NewField = !Address!.upper().
• Confirm both fields used in the join contain values in all upper case.

Pasos para reproducir