Cannot Activate Acrobat XI On New Computer Although Deactivated On Old Computer

Question

I have a legitimate standalone perpetual licence for Acrobat XI Pro (Windows), currently updated to 11.0.23.

Before disposing of my previous PC, I specifically used Help → Deactivate while the computer was online. Acrobat reported that the deactivation had completed successfully. I therefore no longer have access to that computer.

I have now installed Acrobat XI Pro on its replacement. My serial number is accepted as valid, but activation fails with:

“The serial number is already in use by the maximum allowed computers.”

Selecting “Retry activation. I have already deactivated one of my other computers” simply returns the same result.

I understand that Acrobat XI is end-of-life and that Adobe no longer provides normal technical support for it. I am not asking for technical support for Acrobat XI.

The issue I am reporting is specifically that Adobe's licensing system appears not to have recorded a deactivation which Acrobat explicitly reported to me as successful. I relied on that successful-deactivation confirmation before disposing of the old computer, so I now have no means of repeating the operation.

Could an Adobe Community Manager please inspect the server-side registration and activation/deactivation history for my serial number, as Adobe Community Managers have been able to do for other Acrobat XI users, and confirm:

Whether Adobe's servers recorded the successful deactivation from my previous computer; and
How many activations Adobe's database currently records against the serial number.

I still have the original serial number and can provide it privately to an authorised Adobe employee if required. I will not post the serial number publicly.

I also have a current Adobe subscription under my Adobe account, although Acrobat XI itself was purchased separately as a standalone perpetual product.

Thank you.

DFWTechGuy · Answer

Since Acrobat XI is already end-of-life, I don't think there’s much that can be done locally if the old PC is no longer available.

The important part is that Acrobat showed the deactivation as successful before the old computer was disposed of. Since the new installation is still reporting the activation limit, this looks like the deactivation may not have been recorded correctly on Adobe’s side.

I’d avoid posting the serial number publicly. If an Adobe Community Manager or employee can check the activation history, they may be able to confirm whether the old activation was actually released.

Unfortunately, the normal “deactivate the old computer and activate the new one” process requires access to the old installation, so this may need to be handled by Adobe if the old PC is gone.

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