Citrix Gateway Universal licenses are required to control the number of concurrent users accessing the Citrix Gateway, including full SSL VPN sessions. The Citrix ADC platform license (Standard, in this case) enables the feature set, but the user capacity is determined by the number of Universal licenses installed. To accommodate an additional 3,000 concurrent VPN users, the administrator must purchase and apply 3,000 Citrix Gateway Universal licenses to the appliance. These licenses are sold in user packs and are pooled across a high-availability pair.

A. Citrix ADC Burst Pack: This is a component of Pooled Capacity licensing that allows an organization to temporarily exceed its licensed bandwidth/throughput capacity, not its user license count.

B. Citrix Gateway Express: This is a limited, free version of Citrix Gateway included with Citrix Virtual Apps and Desktops. It is not a purchasable license to expand an existing deployment's user capacity.

D. Citrix ADC Upgrade: Upgrading the platform license (e.g., from Standard to Advanced) unlocks additional features on the appliance but does not inherently increase the concurrent user license count by 3,000.

1. Citrix Product Documentation. (2023). Licensing for Citrix Gateway. Citrix Docs.

Section: Licensing for Citrix Gateway

Content: "You must install Citrix Gateway Universal licenses to provide users with access to Citrix Gateway features. Citrix Gateway Universal licenses are concurrent user licenses... For example

if you want 100 users to connect to Citrix Gateway at the same time

you need 100 concurrent licenses." This directly supports the need for Universal licenses for user access.

2. Citrix. (2022). Citrix ADC Data Sheet.

Section: Licensing

Content: The datasheet specifies that Citrix Gateway Universal Licenses are required for secure remote access and are licensed on a per-concurrent-user basis. It distinguishes these from the platform licenses (Standard

Advanced

Premium) which determine feature availability.

3. Citrix Product Documentation. (2023). Citrix ADC pooled capacity. Citrix Docs.

Section: Burst to cloud

Content: "The burst to cloud feature helps you to use the licenses from the public cloud when you exceed the on-premises license limit." This document clarifies that burst capacity relates to instance and bandwidth allocation in a pooled model

not concurrent user licenses for VPN.