If you still have access to the old computer where the key is active:
In some cases, even after adding a new 20-user key to an existing 40-user setup, the system may still block registrations beyond the original 30 or 40 until a full refresh or configuration change occurs. How to Fix Error E00010F e00010f activation key number limit over
No. Microsoft does not automatically "forget" old activations. You must manually deactivate or contact support. If you still have access to the old
Attempting to register a new IP phone when all existing license "slots" are already occupied by other active devices. You must manually deactivate or contact support
For IT professionals or advanced users, it helps to know how the limit is enforced. Microsoft does not just count "number of times installed." It uses a – a unique ID based on your motherboard, hard drive, and network card. Two installs on identical hardware (e.g., same PC after a reformat) may not trigger e00010f. But two installs on physically different machines will .
: Attempting to use the same product key on more computers than the license agreement permits. Hardware Changes