VDA  previosly were using Hybrid Azure AD environment  and  after removed all the Azure Ad Joined devices  VDA's are  checking the status of Hybrid joined machines

To stop the Virtual Delivery Agent (VDA) from checking the status of Hybrid Azure AD joined machines:

Modify the registry settings on the VDA.
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\VirtualDesktopAgent

If it does not exist, you will need to create it

VirtualDesktopAgent
DWORD (32-bit) DisableHybridJoinCheck =1