The number of seats corresponds to the number of email address. We only enforce the seat count with the email filtering application. With the URL filtering, we do not monitor the number of users, however, end user deployments can be audited and there are penalties for exceeding license agreements (***see below)
Remember the Cisco PLG (powered by Trend Micro) license allows for
1) content filtering (category based; currently 82 categories)
2) Web Reputation filtering
3) Email Spam & Virus blocking.
Each are optionally enabled on the same license (ie. EMAIL Proxy setup is optional).
This product does not include a desktop client, although Trend Micro sells those directly.
For customer using the 30-day trial keys, as they see the benefits of the ProtectLink solution, many if not all, will want to purchase the full 1 year subscription. In this case, they should order the Renewal key to extend their 30-day or 1 year trial to a full subscription.
** A ProtectLink Gateway customer may only use that number of the licenses for each it has paid, and not more. Otherwise, the end user will violate the terms of the license that expressly provides that this software may be used by “no more than the maximum number of users for which license fees have been paid”, as stated on the purchase order.
Further, Trend Micro has a right to an audit of the company and if unlicensed use is discovered, the end user can incur a penalty on top of what they would owe for the additional licenses.
I have copied the relevant provisions from the EULA below.
Sec. 9(b)Paid Use License.For all other Enterprise or SMB Trend Micro Software:You may install the Software for access and use by no more than the maximum number of employees or independent contractors (“Users”) for which license fees have been paid, as stated on Your purchase order, order confirmation or License Certificate. License fees are required for each User who has access to a Computer (including a shared Computer) which is connected directly or indirectly to the network server(s) on which the Software is installed. No more than five (5) Users of Trend Micro Control Manager may access and use that Software’s report generation functions at the same time; however, additional concurrent usage licenses are available in groups of five (5) Users. In addition, You may install the Software for access and use by no more than the maximum number of virtual machines (“Virtual Machines”) for which license fees have been paid, as stated on Your purchase order, order confirmation or License Certificate. License fees are required for each Virtual Machine that is connected directly or indirectly to the network server(s) on which the Software is installed. You may make a reasonable number of copies of the Software for back up purposes.
Section 22. Audit. Upon reasonable notice and during regular business hours, Trend Micro shall have the right to audit Your use of the Software or Service. If the audit reveals unlicensed Computers, Virtual Machines or Users, You shall pay Trend Micro, within thirty (30) days of notice, the then-current license, subscription and/or Maintenance fees for unlicensed Computers, Virtual Machines or Users. If the fees payable for unlicensed use exceed five percent (5%) of fees actually paid for the audited time period, You must reimburse Trend Micro for the costs and expenses of the audit.