IIS ARR rule for Exchange OWA and Autodiscover

Hi,

I am trying to set up IIS ARR URL rewrite rules for our exchange 2016 farm and it seems to be working however when I try to access OWA from outside with different browsers it seems to behave differently. So for example from chrome before OWA login page is displayed there is a pop in for credentials and afterwards it redirects me to the mailbox and sometimes it redirects to OWA login page where I am asked to enter credentials again and then it works. In IIS ARR I have seen this REWRITE_DISABLED_KERNEL_CACHE log in FailedReqLogFiles.

I follow those guidelines to set up load balancing for Exchange using ARR 3.0.

https://social.technet.microsoft.com/wiki/contents/articles/36083.application-request-routing-for-microsoft-exchange-server.aspx

https://blogs.technet.microsoft.com/exchange/2013/07/19/part-1-reverse-proxy-for-exchange-server-2013-using-iis-arr/

And also I have enabled proxy forwarding on IIS ARR servers.

Any help is much appreciated. Thank you.