Sinch Contact Pro Certificate renewal - CUSTOMER ACTION REQUIRED - AF

What to do

• Check whether you use Sinch Contact Pro - AF (South Africa) in us. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Check that everything you run on Sinch came back after the window closed 2026-11-08 07:01 UTC.

• Subscribe to Sinch's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=sinch works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Sinch 3

1. scheduledOct 8, 2026, 9:43 AM UTC

   Dear Customer, The Sinch Contact Pro certificate *.cc.sinch.com will be renewed during Sunday November 8th, 2026. Start time: 2026-11-8 (Sunday) 6 AM UTC End time: 2026-11-8 (Sunday) 7 AM UTC During the maintenance window, all voice channels will experience a short disruption, up to 10 minutes. Customer Action: The certificate authority and the issuer chain will change to Amazon. To avoid potential connection issues, Sinch strongly recommends verifying the certificate trust relationship in advance. How to verify the certificate trust relationship: Contact Pro UIs (e.g., Communication Panel): Visit https://certificatetest.cc.sinch.com/, Ensure that no security warnings appear when connecting. Integrations using cc.sinch.com (e.g., CRM integrations): Check that your system trusts the new issuer chain. You can also test connectivity using URL https://certificatetest.cc.sinch.com/ . SIP trunks: Review your configured trusted issuers to ensure the new issuer chain is accepted. New certificate details: CN = cc.sinch.com (*.cc.sinch.com) Serial: 0A:22:B4:2A:71:41:AF:02:70:2B:81:4A:CC:70:24:EA Issuer: CN = Amazon RSA 2048 M04 CN = Amazon RSA 2048 M04 Serial: 07:73:12:4F:2A:95:2E:3E:D1:8A:58:BD:B8:5D:1B:C0:CE:5F:27 Issuer: Amazon Root CA 1 CN = Amazon Root CA 1 Serial: 06:6C:9F:CF:99:BF:8C:0A:39:E2:F0:78:8A:43:E6:96:36:5B:CA Issuer: Amazon Root CA 1 Certificates are available for download here: https://clxgroup.sharepoint.com/:f:/s/EXTSinchSharing1/IgC-iGB_R7TkSJzUCFHnT7ulAcom1Bo2RLwLJm9XrAmregQ?e=HNH6tC For additional information or questions, please contact us via the Sinch Enterprise Support portal: https://sinchenterprise.atlassian.net/servicedesk/customer/portal/1181 Best regards, Sinch Contact Pro Team

   provider

2. scheduledNov 8, 2026, 5:00 AM UTC

   Maintenance will begin as scheduled in 60 minutes.

   provider

3. in_progressNov 8, 2026, 6:00 AM UTC

   Scheduled maintenance is currently in progress. We will provide updates as necessary.

   provider

Corrections

None so far.

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