Hello,
I have upgraded version 6.3.8.99 (6.3 SP4) in 2020 and O365 is still reporting that the voicemails are using TLS 1.0 in the TLS report in the Mail Flow dashboard of the Security Admin Center.
As of now, Microsoft appears to be letting mine through, but that may not last.
Does anyone have any advice or experience with this or know if SP5 or 6 fixes this issue?
Thank you,
Eric