Deactivate a license from non-internet connected computer

On a rarely used legacy computer, I still have Adobe installed and activated.  Now, trying to move my application to another machine, it says I must deactivate first, but deactivation fails and there is no work around provided, no help phone support, no support of any type for that matter, other than the community of other users.

Does anyone have a workaround for this or a number I can call Adobe and get a resolution so that I can continue using the software which I purchased long ago and still want to utilize.