For some reason after obtaining a subscription to use Technical Communication Suite, I'm unable to activate my Acrobat Pro that should come with it.
Since it's a subscription, there's no serial number to enter. It knows I have an Adobe account, but it won't acknowledge that as being part of my Technical Communication Suite subscription.
Check with Adobe Support - IIRC you still download and install TCS software and use a serial number even if you are running a subscription.
When I've gone through the steps to get to that point, it routes me to the forums when it comes to "activation and license" issues.