Hi,
In my previous endeavours to solve this business requirement where multiple users will be able to use the Adobe acrobat feature to convert SAP pages inside SAP to PDF, I was told that it is not possible to do this for multiple users at the same time. However I have found an article according to which it says it is possible. Could you check it once and let me know if this article can be used for implementing the requirement stated above as this link clearly indicates that Adobe Acrobat is supported on Citrix.
Please find the link below where it states it is adobe acrobat is supported in Citrix for multiple users.
http://www.adobe.com/devnet-docs/acrobatetk/tools/AdminGuide/citrix.html.