
Use the ICISite interface UserLimitMessage property to retrieve or edit the text of the message shown when the site's user limit is reached.
Signature:
HRESULT UserLimitMessage([out, retval] BSTR *pVal);
HRESULT UserLimitMessage([in] BSTR newVal);
Refer to Site FTP Settings Properties for an illustration of how this and other ICISite properties can be accessed in the Administrator interface.