ssl certificate

  1. Wildcard certificate *.domain.ch

    Hello I migrated V18 to V20, I did not update the certificate on the new V20, it was restored from V18 and valid till oct 2026, now the provisioning (port 443) work only if I disable "Only Accept Trusted Certificates" under Trusted certificates on the phones yealink T48U for example, maybe this...

  2. Rinnovo Certificato SSL

    Ciao, Ho il certificato scaduto su un centralino. l'ho aggiornato alla versione 3CX Version 20, Update 6 RC, Build 20.0.6.675, April 2025 e se gratuito il comando CMD: "C:\Program Files\3CX Phone System\Bin\PbxConfigTool.exe" -renew-certificates. Il comando non mi da nessun errore ma il...
    • Gigi
    • Thread
    • ssl cert ssl certificate ssl certificate expired ssl-certificate
    • Replies: 4
    • Forum: Phone System / PBX

  3. Unable to upgrade to V18 Update 9B

    I have received emails from 3CX advising that I need to upgrade from V18 Update 9A to Update 9B The webpage at https://www.3cx.com/blog/news/ssl-certificate-update-2025/ provides instructions on how to achieve this update, but they do not work. When I visit the updates page on the management...

  4. Can not Send email SSL or TLS issue - 3CX V20

    Hi team, Iam using a new 3CX installation with 3CX FQDN. First week was working fine. After that, when i try to reset password on V20 i receive this message: " An error occurred while attempting to establish an SSL or TLS connection. The server's SSL certificate could not be validated for the...
    • JLMSimao
    • Thread
    • email addresses password ssl certificate webclient
    • Replies: 3
    • Forum: Web Client

  5. SSL Certificate renewal failed

    I keep receiving this error, but do not know why. Everything looks ok on my 3CX Subscriptions page. The SSL Certificate renewal for xxxxxx.xx.3cx.us failed - Invalid License Key Certificate generation failed because the license key is not valid or its maintenance has expired. For an SSL...

  6. SSL RENEWAL - INVALID LICENSE KEY

    I received 2 emails today, 29 JAN 2024. First: The SSL Certificate for your 3CX installation at xxx-1234-3cx.il.3cx.us was automatically renewed for the next 90 days. Your 3CX web server is now secure and all web traffic that passes via 3CX is encrypted. Second: The SSL Certificate renewal for...

  7. Custom Cert configuration

    Hi, our 3cx hosted in windows server 2016 just updated to version 18 update 8 (build 939). last year I was able to renew the SSL using these method But when I am trying it now it doesnt renew my certificate when trying in the web browser, there are no errors in logs also after restarting the...

  8. SSL VPN Certificates - issue and renewal - Debian

    I spent a whack of time earlier this week trying to piece together the correct way to renew the SSL cert for our full non-3CX-FQDN server. For the benefit of others, I just wanted to share the procedure of how to sort your own SSL cert. We use thesslstore for our cert, but so long as your...
  9. Michael Schönburg

    Can one import certificates and activate them later?

    Is it possible under Linux (Debian 10) to import the new ssl certificate for the pbx before the current certificate expires, so that there is no downtime? Does Debian automatically change the certificate or is there no way to replace the certificate for the 3CX without downtime? How do you guys...

  10. 3CX with Teams integration

    Hello everyone. I am getting Teams integrated within 3CX. I already made an FQDN in the exact domain of the MS365 tenant. A record that points to the IP address of the PBX. I am now trying to get an SSL certificate from a Microsoft-approved vendor. The only thing that is bothering me, is that I...
    • stefkraaijeveld
    • Thread
    • 3cx direct routing help ssl cert ssl certificate stuck teams teams direct routing
    • Replies: 14
    • Forum: MS Teams

  11. SSL Cert - Options?

    When we upgraded from V16 to V18, we were told it was required to have an SSL for the FQDN. We did so and it renews in a month. Since it is up and running now, is that cert required still? I do not fully understand the need of the SSL. I know we can still access site when it expires as it...

  12. Certbot renewing custom FQDN but not applying certificate

    Hi, We recently had to uninstall, reinstall and restore our system. After re-installing it, all was working fine apart from the SSL certificate. It would come up as the page is not secure. This is hosted on a linux AWS server. We have used certbot to find the cert and renew it. However once...
    • danaslam
    • Thread
    • custom fqdn dns doamin self hosted self managed ssl ssl certificate
    • Replies: 1
    • Forum: Phone System / PBX

  13. SSL Certificate - Required?

    When we updated from 16 to 18, our reseller said we needed to buy an SSL for the FQDN to allow the upgrade to work correctly. Is the SSL is required to keep 3CX up and running? Thank You
  14. Armor-64

    SSL certificate

    Hello and good morning! In our company we have our NFC 3CX PBX (Partners) and we cant connect an sbc becouse of a SSL certificate. We have the pbx 2-3 years know so as far as i know the certificate is not autorenewed.(all i know free ssl renewal is for one year from 3cx) Our FQDN is 3cx one...

  15. Solved Enable Microsoft Teams Direct Routing: Private key and certificate do not match. Upload the correct certificate and key

    Hello, I'm working to test Microsoft Teams Direct Routing. My cert is from Sectigo (appear in ms list). The cert comes with .crt extension but it's in PEM format (I can read the content in text) 3CX do not accept it and return this error: Private key and certificate do not match. Upload the...
  16. NicholasBarnes

    System won't renew LE certificate

    Debian, self-hosted. I have an interesting problem from a customer who said "Oh yes, we're happy to manage our own system"... Turns out they hadn't updated it at all since it was installed early last year. Their LE certificate stopped renewing some time after May 6th this year. For the first...

  17. HTTPS Port forwarding is not configured when setting up O365 integration

    Hi everyone, I am new to this setup, we got our MS exchange installed on primes and 3CX on primes. We also got our Azure AD and Microsoft 365 admin online. We got our SSL certificate from Go Dadday that are verifying for all our domain. I have followed the documents to setup the integration...
    • Kim heng
    • Thread
    • own fqdn ssl certificate teams integration
    • Replies: 10
    • Forum: Office 365
  18. Mayank143

    AES, RSA & VPN on 3CX PBX System

    Dear Friends, Started trial (installed on AZURE) of 3CX phone system (PBX) only for internal calls/msg/chat/video/audio calls (NO OUTER SERVICE). 1. Need to know what kind of AES-256/512 & 2048-RSA they are using for internal communications 3cx to 3cx? 2. As they are using FREE Lets Encrypt...

  19. Solved SSL Error

    We recently migrated from an Azure Instance to 3CX hosting. After chosing reinstall and selecting the backup we are recieving SSL error on machines. Any ideas?

  20. Solved Invalid SSL

    We have setup a new PBX with a 3CX FQDN. Whenever I navigate to the management portal, I can see that the SSL is not working correctly. When looking at the SSL I can see it is "invalid". We have an active licence, can anyone advise on how to correct this?
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