How do you keep PDF licensing from turning into a billing mess?

Before changing anything else, reconcile the account: current seat count, assigned users, invoices, renewal terms, and any recent order changes. Save the relevant records and ask support or your reseller to confirm the correction in writing, including what the next invoice should show. Some enterprise agreements may have minimum seat requirements, so check your own terms rather than assuming unused seats can always be removed immediately.

I would not pick a replacement based only on the license price. Make a short test plan for the jobs people actually do, such as editing, forms, signatures, OCR, accessibility checks, and printing. Also have IT and procurement check deployment, security requirements, file compatibility, support, renewals, and cancellation terms. Reports on alternative vendors vary, so trial the exact product and purchasing route you would use.

Keep install problems separate from billing problems. If a managed Acrobat package fails or behaves differently depending on what is already installed, reproduce it on a test machine, record the package version and logs, and check for overlapping installs or deployment steps. That gives support something concrete to investigate without turning a production reinstall into the troubleshooting plan.

A simple cost-control option is to reserve the higher-priced PDF app for people who can explain why they need its specific features. Give everyone else a lower-cost option only after checking that it handles your common documents and fits your support and security requirements. That keeps a vendor switch from becoming an all-or-nothing decision.