Thanks to Patrick Husband for the heads up here, really appreciate our community sharing information to keep everyone up to date.
ACP, (certified) Audio Conferencing Providers, have a direct connection to Skype for Business Online and could offer dial-in numbers and PIN’s for SfB Online conferences, where the PSTN element of the conference was held on their service and connected to Skype for Business Online.
Last year, Microsoft said that 3rd Party PSTN Audio Conferencing (ACP) for Skype for Business Online was going end of life April 1, 2019.
Just 4 days ago some tenants got messages saying reminding them that ACP was going to stop working on 1st April 2019.
Now it looks like the deadline has been expended for at least some if not all customers. I haven’t seen this message (MC175441) on some tenants yet. Thanks to Patrick for sending it to me.
Customers without ACP today will no longer be able to purchase or enable it. Existing ACP customers can add new users until the end of life period. Microsoft’s recommendation is still to move to their PSTN conferencing service (called “audio conferencing“).
The documentation still currently says April 2019 end of support date.
This doesn’t affect Microsoft Teams since ACP was never available for Microsoft Teams.
For full disclosure, PGI, Modality Systems parent company are one of the certified ACP providers.