tag:blogger.com,1999:blog-9054146920450733450.post8879884760454475663..comments2023-05-16T02:41:52.702+12:00Comments on Troubleshooting Lync: EWS not working externallyUnknownnoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-9054146920450733450.post-90097624570706925442018-09-08T18:59:49.370+12:002018-09-08T18:59:49.370+12:00The information you have posted is very useful. Th...The information you have posted is very useful. The sites you have referred was good. Thanks for sharing this: <a href="https://www.ewswebs.com/about-us/" rel="nofollow">ewswebs.com</a><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-9054146920450733450.post-64164528364824061732014-06-09T17:33:41.803+12:002014-06-09T17:33:41.803+12:00Hi Paul,
yes I did. As I’m testing those things in...Hi Paul,<br />yes I did. As I’m testing those things in our test environment I just bypassed my reverse proxy and directed external traffic to my CAS server directly just to exclude reverse proxy as problem source. I also have to say that this credential question comes only once. When I type my AD credentials and select save my credentials it does not ask anymore. But when users are changing Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-9054146920450733450.post-84185628928796193152014-06-07T06:44:24.672+12:002014-06-07T06:44:24.672+12:00Did you also take a look at your Reverse Proxy rul...Did you also take a look at your Reverse Proxy rule for EWS traffic as I have found this to often be a cause as well. Lync does not support pre-authentication (currently) so the Reverse Proxy rule should not ask the user to authenticate but rather to allow the client to authenticate directly.Paul Bloemhttps://www.blogger.com/profile/11564360712443814638noreply@blogger.comtag:blogger.com,1999:blog-9054146920450733450.post-46193011677555918002014-06-06T22:08:35.179+12:002014-06-06T22:08:35.179+12:00Hi,
I was happy to find this article as I have exa...Hi,<br />I was happy to find this article as I have exactly this problem. But after trying both solutions first client solution then server side solution nothing of this prevents the Credential pop-up. It just keeps popping up all the time. I somehow suspect that Internet Explorer 11 is causing the problem. Do you have already more information about that?<br />Thank you!<br />Robert<br />Anonymousnoreply@blogger.com