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EWS - Reply command - odd behavior

In ultima perioada am inceput sa lucrez cu serverul de Exchange prin intermediul la EWS si am observat un comportament nenatural, care poate sa genereze erori daca nu exista unit-teste pentru acest flow.
Se da actiunea de reply. Pe exchange avem o comanda separata, care genereaza automat mesajul de reply si face autofill la TO si CC. Pana aici nimic special, doar ca aceste doua liste nu ne sunt returnate de serverul de exchange, dar in momentul in care se face SEND, ele se completeaza automat.
Dar ce se intampla daca vrem sa adaugam inca o adresa de email in lista de TO. Dupa ce adaugam un email si executam actiunea de send o sa avem parte de o surpriza. Mesajul este trims doar la persoana respectiva si atata.
Ce se intampla? Se face override la lista, chiar daca avem o List si noi apelam metoda Add.
Solutie: In mesajul de raspuns trebuie sa adaugam manual lista de adrese. Sa nu uita ca FROM devine TO.


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