My Citrix/Xenapp licensing monitor fails?

It is most common for Citrix licensing to fail the WMI connectivity.

You can check if it's available for monitoring via Windows Power Shell.

Run in power shell:

((get-wmiobject -namespace "Root/CitrixLicensing" -list) | ? {$ -match "Citrix_GT_License_Pool"})

And you should see something like this:

if you get an error or blank line then repairing is needed.