Yes, sure, thanks a lot for you help.
This is the original feature class with the attachments: Points_ISA_2020
This is the result of the spatial join (without attachment) : Points_ISA_2020spatialjoin
Then I joined Points_ISA_2020spatialjoin to Points_ISA_2020 and it adds the fields I want and still has the attachments:
But then when I try to make a permanent join, I tried to do a feature class to feature class but no success (I checked the Maintain attachment).
And the result : no attachment!
Here is a screenshot of what my GDB looks like:
Thank you for your time !
MJ