# Dynatrace License Check Error **URL:** \ **Category:** Open Q&A\ **Tags:** installation, mission-control, account-management, licensing\ **Created:** [May 29, 2019, 8:51am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841 "2019-05-29T08:51:54Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![willie\_liu](https://avatars.discourse-cdn.com/v4/letter/w/839c29/32.png) [@willie\_liu](https://community.dynatrace.com/u/willie_liu)\ **Post date:** [May 29, 2019, 8:51am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/1 "2019-05-29T08:51:54Z")
After install Dynatrace Managed （Install Server Success） it shows License Check Error sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException Something wrong? We install with no Proxy ---
**Author:** ![Julius\_Loman](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/julius_loman/32/51_2.png) [@Julius\_Loman](https://community.dynatrace.com/u/Julius_Loman)\ **Post date:** [May 29, 2019, 9:04am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/2 "2019-05-29T09:04:13Z")
Is there maybe a transparent proxy between mission control and the Dynatrace server? What is your output of the following command from the Dynatrace server: ```auto echo |openssl s_client -showcerts -connect mcsvc.dynatrace.com:443 ``` Does it show the following? Server certificate subject=C = US, ST = Massachusetts, L = Waltham, O = Dynatrace LLC, OU = GTG, CN = [mcsvc.dynatrace.com](http://mcsvc.dynatrace.com) issuer=C = US, O = DigiCert Inc, CN = DigiCert SHA2 Secure Server CA ---
**Author:** ![skrystosik](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/skrystosik/32/21133_2.png) [@skrystosik](https://community.dynatrace.com/u/skrystosik)\ **Post date:** [May 29, 2019, 9:05am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/3 "2019-05-29T09:05:57Z")
Now you are using proxy or you have traffic open wide to Mission Control? We have the same issue as you but with proxy. In our case, self signed certificate was overwrite by proxy to client one. We had to add client certificate (root + cer) to trusted according to this article: [https://www.dynatrace.com/support/help/setup-and-configuration/dynatrace-managed/configuration/how-to-add-a-certificate-to-server-trust-store/](https://www.dynatrace.com/support/help/setup-and-configuration/dynatrace-managed/configuration/how-to-add-a-certificate-to-server-trust-store/) Check in your infrastructure if there is something that can overwrite your certificate and do steps according to link above. Sebastian ---
**Author:** ![Radoslaw\_Szulgo](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/radoslaw_szulgo/32/1977_2.png) [@Radoslaw\_Szulgo](https://community.dynatrace.com/u/Radoslaw_Szulgo)\ **Post date:** [May 29, 2019, 9:14am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/4 "2019-05-29T09:14:47Z")
That’s a symptom of a communication issue to Mission Control. There has to be a transparent proxy in your network - probably firewall - as Julius writes. Installer checks Mission Control connectivity and downloads license meta information to orchestrate self-monitoring OneAgent. The error message comes from the JVM - so I assume it’s the indirect output of the Server process. I advise to open a support ticket so our team can make sure your installation works reliably and will help you with proper configuration. ---
**Author:** ![willie\_liu](https://avatars.discourse-cdn.com/v4/letter/w/839c29/32.png) [@willie\_liu](https://community.dynatrace.com/u/willie_liu)\ **Post date:** [May 29, 2019, 9:30am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/5 "2019-05-29T09:30:43Z")
Yep it show, but there is an error like : verify error:num=19:self signed certificate in certificate chain ---
**Author:** ![willie\_liu](https://avatars.discourse-cdn.com/v4/letter/w/839c29/32.png) [@willie\_liu](https://community.dynatrace.com/u/willie_liu)\ **Post date:** [May 29, 2019, 9:34am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/6 "2019-05-29T09:34:18Z")
It Stop at step 2, cause we cant create the cert as the step ---
**Author:** ![skrystosik](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/skrystosik/32/21133_2.png) [@skrystosik](https://community.dynatrace.com/u/skrystosik)\ **Post date:** [May 29, 2019, 9:36am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/7 "2019-05-29T09:36:02Z")
Trust store is optional, you can skip. Sebastian ---
**Author:** ![willie\_liu](https://avatars.discourse-cdn.com/v4/letter/w/839c29/32.png) [@willie\_liu](https://community.dynatrace.com/u/willie_liu)\ **Post date:** [May 29, 2019, 9:36am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/8 "2019-05-29T09:36:59Z")
i open a support ticket ill wait Thanks ---
**Author:** ![willie\_liu](https://avatars.discourse-cdn.com/v4/letter/w/839c29/32.png) [@willie\_liu](https://community.dynatrace.com/u/willie_liu)\ **Post date:** [May 29, 2019, 9:51am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/9 "2019-05-29T09:51:55Z")
Hi Sebastian if skip how do i get the cert? Willie ---
**Author:** ![skrystosik](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/skrystosik/32/21133_2.png) [@skrystosik](https://community.dynatrace.com/u/skrystosik)\ **Post date:** [May 29, 2019, 10:00am UTC](https://community.dynatrace.com/t/dynatrace-license-check-error/20841/10 "2019-05-29T10:00:31Z")
You need ask your security for certificate