User Acceptance Testing (UAT) is the process of having target users test and validate your XenApp solution. This is to ensure that you are meeting all of their business needs and objectives. The outcome of UAT is to ensure you can support day-to-day business operations.
Clearly defining the acceptance criteria is necessary when performing UAT. This allows you to ensure the environment meets design requirements and user expectations. If your business requirements specify a login time of 30 seconds or less, you can monitor and validate whether the test users' performances meet the requirement. Other common criteria include smooth roaming between devices, connection speed, profile and personalization settings being saved, application transaction times, and graphical quality. Some criteria might be measurable, other criteria might be subjective. Even subjective criteria should be measured through the feedback process.