The following error is seen when attempting to add a Citrix Hypervisor (XenServer) hosting connection:

Error Id: XDDS:49D3D465

Exception: Citrix.Console.Models.Exceptions.ScriptException Invalid connection address.
Check that the address is valid and that it references a host in the XenServer pool.
(...)
InvalidOperation: (:) [Set-Item], InvalidOperationException + FullyQualifiedErrorId :
Citrix.XDPowerShell.HostStatus.ConnectionAddressInvalid,Microsoft.PowerShell.Commands.SetItemCommand Set-Item : The supplied connection address is invalid. (...)

In host connection URL enter XenServer host name in into host connection URL using the same case (upper or lower) as in the corresponding identity certificate of the XS host.

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Problem Cause

In case of https connection to XenServer pool, XenServer host name is case sensitive. The XenServer host name in the URL must match the case of the host name in the certificate.  For example, if the host name on the certificate is all UPPERCASE, then when entering the URL, use ALL UPPERCASE characters.