Discontinuation of support for Session Border Controllers in Exchange Online Unified Messaging

This is a pretty big deal for us as well.  We are a hybrid on premise Cisco Call Manager & Skype for Business on-prem w/ Enterprise voice.  We were going to migrate all of our voicemail to Exchange UM from Cisco but now this is a halt and we have to revert users we just moved recently.

I agree with everyone else that 1 year timeline is surprisingly low for an enterprise.   Our budget process has already occurred for next year, and now we'll have to insert a large add-on for voicemail.  MSFT should give at least 2-3 years notice.

I would also like to see a statement of committment to on-prem Exchange UM or if they'll be abandoning that as well in future versions.