Spotted by the beach:
Please reference the Microsoft documentation on this, short names will not work:
Client computers must be members of a local or trusted domain before they can access a domain-based namespace by using the format \\NetbiosDomainName\RootName. If clients are members of a workgroup or an untrusted domain and can resolve DNS names, they can access domain-based namespaces by using the format \\DNSDomainName\RootName. For information about how clients determine the list of trusted domains, see “DFS Physical Structures and Caches on DFS Clients.”
Eventvwr error: Windows could not record the Resultant Set of Policy (RSoP) information for the Group Policy extension <Citrix Group Policy>. Group Policy settings successfully applied to the computer or user; however, management tools may not report accurately.
Solution: Deleting all sub folders and files under C:\ProgramData\Citrix\GroupPolicy on the problematic XA server can resolve the above warning message.
A corrupt Citrix print spooler keeps causing spoolsv.exe to crash. A full reset of the spooler is required. Unfortunately, Fix It #9829711 is retired. Fortunately, gracious github user jdickson289 has created a powershell replacement for both the light and full options. This can be found here: Print-Reset-Tool.
Also zipped up here for convenience.