How do I find a specific machine's activation ID, so I know which authorisation to deactivate?

How do I find a specific machine's activation ID, so I know which authorisation to deactivate?

Hello Nicholas Spalding
I can see that you already deactivated one of the licenses. Do you still need assistance with this?
Thank you,
Sorin
Hi Sorin, Thanks for getting back to me. I got some help from Sebastiana in your help centre. I wasn't able to deactivate or reset the licences myself. I got error messages. But she did it for me. Now I'm just fixing up my activation on the second licence (needed to rename the .lic file). Thanks.
Hi Sorin, Thanks for getting back to me. I got some help from Sebastiana in your help centre. I wasn't able to deactivate or reset the licences myself. I got error messages. But she did it for me. Now I'm just fixing up my activation on the second licence (needed to rename the .lic file). Thanks.