Citrix Cloud XenApp XenDesktop - unable to delete machine catalogs.
The catalogs are either in pending state or are hung and are not getting error-ed out.

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Please follow the following steps to remove the machine catalog:

1. Make sure that there are no machines in the machine catalog. Remove if there are any.

2. Install powershell SDK on any machine in the same domain/vnet (Note: do not install on a Cloud Connector or VM with Citrix software present) using the following:
https://www.citrix.com/blogs/2016/07/01/introducing-remote-powershell-sdk-v2-for-citrix-cloud/.

http://download.apps.cloud.com/CitrixPoshSdk.exe (download link) .

3. Once installed, run the following command in Powershell (run as administrator) to remove the catalog:
> asnp Citrix*
> Get-XDAuthentication
(a new page should pop up asking for your citrix cloud credentials. Please login here and get back to the windows powershell)

>Remove-BrokerCatalog -Name "CatalogName"

4. Once the command completes without any thrown errors then refresh the Studio console to confirm the catalog has been removed. 

If there are any throw errors or additional questions with the above steps please reach out to Citrix Support at 1-800-4-Citrix

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Problem Cause

Possible cause: the connection between the Connector and DDC could be broken at the time of deleting the catalogs.
Another possible cause: Locked identity pool

https://www.citrix.com/blogs/2016/07/01/introducing-remote-powershell-sdk-v2-for-citrix-cloud/.
http://download.apps.cloud.com/CitrixPoshSdk.exe