Acrobat pro not linking to cloud

@wonderful_view0816   Adobe's Creative Cloud subscriptions, including Acrobat Pro, typically limit the number of active devices you can be signed in to simultaneously. The exact number depends on your subscription plan. Two devices are a common limit for individual plans. It sounds like you might have reached the limit with your iPad, and phone. Go to the Adobe website (adobe.com) and sign in to your account. Look for a section related to "Account Management" or "Plan." There should be a list of the devices currently signed in. This will confirm if you've hit your device limit. 

This is the most likely solution. You need to sign out of your Adobe account on one of your other devices (likely the old computer, unless you no longer use it). On each device (old computer, iPad, phone), open the Creative Cloud desktop app (if installed) or an Adobe app (like Photoshop or Acrobat Reader). Look for a "Sign Out" option in the app's menu (often under "Help" or your account icon).