Thank You for the answer, but I have the last version of Acrobat DC. I think at this moment that the problem is in the Registry, I have before Outlook and then I have installed Outlook 2016 within OFFICE 2016. May be that the problem is in the MAPI32.dll file, if is corrupted. I found a fix for this problem (regedit and delete parameters) and or rename MAPI and than repair OFFICE. What do You think about? Best regards Francesco
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