Lync 2013 External Authentication

I setup LYNC 2013 and its working fine internally. I setup TMG and EDGE server. Both are working fine. THe problem I have is that I can't login to the LYNC server from the outside using my android or iphone. I'm getting

reason="The web ticket is invalid. " faultcode="wsse:InvalidSecurityToken"
X-MS-WebTicketURL: https://internalserver.domain.com/WebTicket/WebTicketService.svc
X-MS-WebTicketSupported: cwt,saml
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SuperRootAsked:
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SuperRootAuthor Commented:
I found out why. THis is because of webticket has anonymouse access in IIS where it suppose to be just windows authentication.
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