Hi!! Important, for people who want to use fLow in Spanish, rename
split(body('Get_task_details')?['description'],'OutlookMessageId=')[1] by
split(body('Obtener_detalles_de_tarea')?['description'],decodeUriComponent('%0A'))[0]
And
split(outputs('Compose'),'MessageId=')[1] by split(outputs('Redactar'),'messageId=')[1]
Thanks for the work, it works great!!!