I need three PC to use acrobat DC, what I need to do? I've subscribed one year,but it's only for two PC use.
You can install the software on as many PCs as you like but you can only activate two for use at a time, and only use one at a time.
So you can toggle activations between PCs depending on which one you're using at a given time.
just buy 1 more
If you do require a second membership so you won't have to log out, be sure to use a different Adobe ID for the purchase.