Since last weekend, our Outlook Anywhere has stopped working for Outlook clients on windows 10. Outlook 2013 works still on my win 7 laptop but any win 10 laptops I've tested just repeatedly come up prompting for credentials and not successfully connecting to our exchange 2010 server.
In the logs I found:
May 2 12:16:48 sophos-utm-int 2017:05:02-12:16:48 sophos-utm-int reverseproxy: [Tue May 02 12:16:48.412296 2017] [auth_basic:error] [pid 25187:tid 3718675312] [client 125.255.42.75:31749] AH01614: client used wrong authentication scheme: /rpc/rpcproxy.dll
May 2 12:16:48 sophos-utm-int 2017:05:02-12:16:48 sophos-utm-int reverseproxy: id="0299" srcip="125.255.42.75" localip="192.168.10.241" size="381" user="-" host="125.255.42.75" method="RPC_IN_DATA" statuscode="401" reason="-" extra="-" exceptions="SkipURLHardening" time="4495" url="/rpc/rpcproxy.dll" server="mail.shoalhaven.nsw.gov.au" referer="-" cookie="OutlookSession=\"{1E68F949-EC5F-4B44-8321-3810F4924A4C} Outlook=16.0.4266.1001 OS=10.0.14393 CPUArchitecture=9\"" set-cookie="-"
I don't believe anything has changed on the utm or on the server. However last week exchange 2016 was installed on a new server in readiness for us to migrate.
any hints or clues would be appreciated.
regards
andrew
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