Skype for Business 2019 on Premise DNS issues

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Hii I have a problem when log in skype for business, the error code kb2566790

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I have tried this troubleshoot on this link (https://docs.microsoft.com/en-us/SkypeForBusiness/troubleshoot/online-configuration/dns-configuratio...), add SRV record and CNAME record on my DNS server but still cannot log in SFB. But when I change my computer with DNS google 8.8.8.8 I can log in. It seems like my DNS has a problem. Can someone help me with this? I really appreciate someone helps me with this.

 

i have read this post that similar to my problem https://techcommunity.microsoft.com/t5/skype-for-business-server-2019/skype-for-business-2019-on-pre... but I don't really understand it.

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