In a previous article we’ve mentioned that Microsoft will no longer use TLS 1.0 and 1.1 after 15 October 2020 and that they will move over to TLS 1.2 for better security.
After the deprecation of TLS 1.0 and 1.1 on 15 October, Skype for Business will no longer show your Free/Busy presence and you will also not be able to use the address book.
We advise that you Microsoft Teams for collaboration and chat features which were previously available in Skype for Business.
Staff who use the Skype for Business application for their office phone number will still have to use Skype for Business to make and receive external PSTN (Telkom, Cell phone) calls. This functionality will be moved to Teams as soon as possible and users will be contacted in this regard.