acrobat pro cannot auto opening when download

Hi พิศิษฐ์376327199mu9,

Thank you for reaching out.

Please let us know what you mean by auto-opening here. Do you mean when opening the PDF, it should open in Acrobat? 

If yes, then use the following steps:

- Right-click on the PDF.

- Click on Open with.

- Select Adobe Acrobat from the list of applications. If the application is not listed, select Choose Another app.

- Then select Adobe Acrobat from the options.

If that does not help, use the steps suggested here: https://adobe.ly/4ebVf0s. 

Thanks,

Meenakshi