Hi,

I would start by checking if the K2 Mobilie App can connect to K2's Autodiscover service.

http(s)://[yourk2serverinstance.com]/autodiscover/autodiscover

Perhaps, you can take a look at the K2 Mobile Troubleshooting documenation.

http://help.k2.com/onlinehelp/k2mobile/userguide/current/default.htm#K2Mobile/Troubleshooting/AutoDiscover.htm%3FTocPath%3DTroubleshooting%7C_____1

K2 and Firewalls (auto discover port)

https://help.k2.com/kb001318

Hi,

Regarding your error, "Could not find the server name". This can be because of Windows STS issuer URL is using HTTPS instead of HTTP.

To resolve this I suggest doing the following :

1. I changed your Windows STS issuer URL to use HTTP instead of HTTPS. This can be done by going to your K2 Management Page > Authentication > Claims > Issuer. 

2. After that, I go to your Realm page in K2 Management, and add the HTTP realms to your environment, and map it to Windows STS.

For other related information, take a look at the documentation below:

https://help.k2.com/onlinehelp/k2mobile/userguide/current/default.htm#K2Mobile/Overview/K2MobileAppSecFAQ.htm?Highlight=%20self%20signed%20certificate

Note, this can also occur when using self-issued ssl cert

You could try using a single URL for both internal and external access, and configure K2 to use the FQDN instead of IP. (if this however applies to your existing situation)

Kind Regards

JacoH