Microsoft Wants Your Input on Exchange Free/Busy After EWS Retirement, Because Apparently This Mess Wasn’t Big Enough Yet
Right, so Microsoft has finally noticed that yanking Exchange Web Services (EWS) out from under everyone might cause a bit of a flaming dumpster fire for on-prem Exchange shops that still need free/busy sharing with Exchange Online. Shocking, I know. The article explains that Microsoft is now asking customers for feedback on how they actually use free/busy access between Exchange Server and Microsoft 365 before they finish burying EWS and calling it “progress.”
Here’s the ugly bit: free/busy data is what lets users see whether someone is available for meetings without summoning the whole bloody contents of their calendar. In hybrid environments, this has traditionally leaned on EWS. And since Microsoft is retiring EWS in Exchange Online, admins quite reasonably started asking, “What the fuck happens to hybrid free/busy now?” A fair question, considering Microsoft loves “retiring” critical plumbing and then acting surprised when the building fills with sewage.
According to the piece, Microsoft has not yet delivered a final replacement path for this specific scenario, but it is collecting customer input to understand how on-prem Exchange organizations use free/busy with the cloud. In other words, they’re still figuring out whether they’ve accidentally sawed through a support beam. Again.
The article points out that this mainly matters to organizations running Exchange Server on-premises in hybrid mode with Exchange Online. If you’re one of the poor bastards still maintaining that setup, this is highly relevant, because free/busy is one of those “small” features users only notice when it breaks—at which point they start filing tickets like deranged raccoons in a server room.
Microsoft is basically saying, “Tell us how important this is and how you use it,” which is corporate-speak for, “We may have overlooked something that keeps your executive assistants from going completely apeshit.” The article encourages admins to provide feedback so Microsoft can assess requirements before EWS retirement cuts off needed functionality. Which is lovely. Nothing inspires confidence like a vendor asking whether anyone was actually using the thing they’re about to kill.
The practical takeaway? If your environment depends on hybrid free/busy between Exchange Server and Exchange Online, don’t just sit there polishing your incident queue. Go make noise. Check your dependencies, confirm where EWS is involved, and tell Microsoft exactly what will break when they rip this shit out. Because if you don’t, they’ll happily interpret your silence as permission to proceed with another glorious “modernization” that leaves admins cleaning up the smoking wreckage.
I once had a manager ask why everyone was suddenly double-booked for meetings after a “minor calendar integration change.” Turned out some bright spark had disabled a service no one understood because it looked “legacy.” We spent two days untangling the fallout while management held status meetings to discuss why no one could schedule status meetings. That, dear reader, is the sort of majestic stupidity this article is warning about.
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