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
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.