Microsoft no longer has its own certificates, which it presents to anynode when establishing a TLS connection, signed by the Baltimore CyberTrust Root CA, but by the DigiCert Global Root CA. The transition to certificates issued by the new CA began at the end of August 2023.
The final transition to the new certification authority (CA) was carried out on October 3, 2023.
All anynode customers who use one or more Microsoft Teams Direct Routing trunks and do not use a version 4.8 or higher or have installed a certificate manually must expect certificate validation errors and a disrupted connection.
Ensure that the additional DigiCert certificate has been added to the trusted list in the Teams node.
Starting from version 4.8, anynode handles this automatically through the Migration Assistant. The new DigiCert root certificate will be automatically migrated to the list of trusted peer certificates. With anynode 4.8, you don’t need to take any further action. We strongly recommend users of older anynode versions to manually add the new root certificate to the trusted peer certificates to prevent unnecessary outages. You can download the required DigiCert Global Root G2 certificate directly from the DigiCert website.
Further information is available on our anynode homepage, detailing where you can view and edit the list of trusted peer certificates in the anynode frontend.