I have recently rebuilt my exchange server from scratch everything is working as it should however I cannot seem to get access external access to the OWA page. It was working before the rebuild. I have followed Bobs instructions here:
https://community.sophos.com/products/unified-threat-management/astaroorg/f/55/t/44114
however this has not work. I have included screen shots of my current settings.
Any help appreciated.
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