When on the View >Virtual Apps & Desktops page, the page is blank and there are no sessions displayed.
The Topology View shows the error "required prereq is missing" (see image below).
Troubleshooting Steps:
When on the View > Virtual Apps & Desktops page, check the top right corner to make sure that the page is not filtered (data is in the search pane).
When on the View >Virtual Apps & Desktops page, try selecting each of the tab options at the top. These pages will be filled in as applicable to your license/environment. (The options "App Servers" and "Published Apps & Desktops" are applicable to Citrix Virtual Apps , formerly XenApp and "Virtual Desktops" is applicable to Virtual Desktops, formerly XenDesktop.
Go to the Configure > Inventory page and make sure the line item(s) for your delivery controller(s) are showing a green box in the 'stat' column.
If there is a RED box, this indicates the delivery controllers are not connected.
Select the line item(s) for the delivery controller that is not connected and click the Edit button at the bottom of the page. A new window opens:
Does the delivery controller have an account applied to it in the "XenApp & XenDesktop monitoring" Section?
If no, proceed.
If yes:
Make sure that these settings are only configured on 1 delivery controller per Citrix site.
Make sure that the account listed has admin rights on the machine. This account is used to run the MonitorIT Agent Service. If this was not the case, you will need to manually start the MonitorIT Agent Service then allow about 5-10 mins for data to populate.
If there is a GREEN box, this means that the delivery controller is most likely missing the required rights.
Select the line item for the delivery controller and click the Edit button at the bottom of the page. A new window, opens:
Does the delivery controller have an account applied to it in the "XenApp & XenDesktop monitoring" Section?
If so, connect to Citrix Studio on the DDC and confirm the account applied has Read-Only Administrative Rights or Full Administrative Rights. No other permissions will work
If no, check your other Delivery Controller(s) as these settings are only to be configured 1 DDC per Citrix Farm/Site.
