Hi Guys,
Not sure what I'm doing wrong here but could use some help.
Subscribed to Office 365. Sophos UTM 9.203-3 with Web Protection turned on won't allow Outlook to connect to Microsofts exchange servers, checked all applicable firewall and web protection rules, even created huge exception list for all of the URL's microsoft uses no go.
Did a little bit more digging around and found out the built in DNS server of Sophos UTM cannot resolve outlook.office365.com. Changed DNS forwarder settings, used both internal and external DNS forwarders, deleted all forwarders to have it query root list but Sophos cannot resolve outlook.office365.com which is a valid address and is what's used by the autodiscover process.
If I query the UTM directly I get
> server 10.0.10.5
Default Server: [10.0.10.5]
Address: 10.0.10.5
> outlook.office365.com
Server: [10.0.10.5]
Address: 10.0.10.5
*** [10.0.10.5] can't find outlook.office365.com: Non-existent domain
>
If I query office365.com
Server: [10.0.10.5]
Address: 10.0.10.5
Name: office365.com
Address: 65.55.39.10
This causes the Webfilter not to work since it can't resolve outlook.office365.com and drops all traffic going to that address. Anyone else seeing this?
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