Moving a client from Exchange 2010 to 2016. All clients on the LAN/VPN can connect via Outlook without issue. Clients on the WAN can connect via OWA but not Outlook. Mobile devices cannot connect. Email can be sent and received internally and externally. The only issue seems to be Outlook Anywhere. I've looked at internal and external DNS and don't see anything wrong. I've updated the firewall polices to point to the new internal IP. Hoping/Guessing it is a simple step I've overlooked but right now I'm at a loss, any suggestions would be greatly appreciated.
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The Most Valuable Expert award recognizes technology experts who passionately share their knowledge with the community, demonstrate the core values of this platform, and go the extra mile in all aspects of their contributions. This award is based off of nominations by EE users and experts. Multiple MVEs may be awarded each year.