we have 2 external facing CAS where as we have stamped external url and internal url fine, auth type enabled in BAsic and WI, all internal facing cas has internal address only, but we are still getting the below event error generated on both CAS.
Some Exchange ActiveSync traffic to the External URL https://mail.mydomain.com/Microsoft-Server-ActiveSync is being blocked due to a misconfiguration of the virtual directory CAS02\Microsoft-Server-ActiveSync (Default Web Site). Please make sure that the External URL is stamped correctly using the Set-ActiveSyncVirtualDirectory cmdlet.