So encountered an issue with upgrading from XenApp 7.8 to 7.9. Install on upgrade of first 7.8 delivery controller to 7.9 goes fine until comes to the “Start the automatic Site upgrade” page. When clicking into it and perform site upgrade get greeted with a lovely:
“An unknown error occurred.
If the problem persists, contact Citrix Support.”
Not too informative i’d suggest – well turns out fix was simple. I was running the upgrade using an account that full administrative privileges on both the Delivery controller server and within the XenApp site itself but not sufficient permissions to the site database. Logging on with an account that had sufficient privileges resolved this issue. Do face a follow-on issue with the license administration console not working within Citrix Studio post upgrade which I will post a resolution for once i have it later. More details: