Just changed out internet provider, including our 5 static IPs. Reconfigured sonic wall, and basically everything works (Internet, email, etc) but not Outlook Web Access / outlook anywhere. In fact, typing the usual mail.domain.com/exchange simply brings up search results now, rather than trying to connect. Our name servers are still still being hosted by our old ISP, since the contract is active for several more months. I'm stumped trying to figure out 'what changed'...after all, email still works in / out as long as you connect to it through our domain. But no one can access through their phones since the changeover. We are running Exchange 2003 / Server 2003.
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Only SMTP servers are using the MX record, not users via web browsers. However, the MX records needs to be updated as well.
Either way the advice you have been given is good. Take a look at the external DNS zone and update your records accordingly.
Keep I mind that …
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