Forum Discussion
LPE Device Support
Will S4B 2019 on prem server have support for LPE devices such as the Polycom CX600 phones?
And LPE does not support TLS 1.2. So they cannot be used with SFB Online and you should not start using it with a brand new SFB2019 Server and lower the TLS security for that old phones.
- LPE devices certainly can be used against S4BO - and have been capable for a long while - as long as the devices are running the latest firmware. TLS 1.2 is not strictly enforced by Office 365 at the moment, so any device supporting a minimum of TLS 1.0 with the correct ciphers and suites will work, LPE included. MSFT backtracked their decision to enforce TLS 1.2, so TLS 1.0 and TLS 1.1 remain in place for the moment.
That being said, the announcement to deprecate certain ciphers and suites in S4BO by Feb 2019 will officially give LPE the death knell because there won't be a common cipher between LPE and Office 365, even with TLS 1.0/1.1 remaining available for the moment. As a result, if you've got on premises LPEs attempting to connect to Office 365 (think Azure AD or Exchange Online or Skype for Business Online) then those connections will not succeed. LPE truly is standing at death's door.
I also don't agree that allowing LPE "weakens" security just because TLS 1.0 is allowed, especially in an on premises environment. There are many arguments that could be made on either side, but an outright statement of "insecure" is far too simplified and doesn't consider all the potential variables of that equation.
