Teams Rooms and Zoom Rooms are getting real interop. Plan around what ships.

Almost every organization I work with has a “standard” meeting platform and a second one it can’t avoid. Teams is the corporate default, but customers and partners send Zoom invites, and the meeting room has to cope. Today, coping means one of three things: a basic guest join with real limitations, a paid third-party interop service, or BYOD/BYOM, where someone joins from their own laptop while using the room’s camera, microphones, speakers and display.

On October 20, Microsoft and Zoom announced the next step. It’s worth understanding what was said, what wasn’t, and what to do in the meantime.

What was announced

Microsoft’s Teams blog introduced Cross-Platform Meeting Connect, which it describes as Microsoft and Zoom building on Direct Guest Join, the feature that lets Teams Rooms join Zoom meetings and Zoom Rooms join Teams meetings (Microsoft Tech Community).

The planned capabilities are:

• HDMI content sharing from a laptop in the room, plus viewing content others share.
• Participant roster on the room display, updated as people join and leave.
• Read-only chat shown alongside video, which users can show or hide. The room can’t send messages.
• Synced room controls, with the first delivery focused on mute, unmute and end-call.
• Dual-display layouts, with content on one screen and the gallery on the other.
• Up to 1080p send and receive for Teams meetings on Zoom Rooms, depending on platform policies, the room device and network conditions.

The same day, Zoom’s Zoomtopia announcements listed cross-platform Teams connectivity for Zoom Rooms, with the same headline features, as expected in the first half of 2027 (Zoom News). Microsoft’s post describes every feature as planned and gives no dates.

Why this matters

The gap today is practical, not theoretical, and both vendors document it. Microsoft’s comparison for Teams Rooms joining third-party meetings lists Direct Guest Join at up to 720p, with no HDMI content sharing, one front-of-room display and no microphone mute sync (Microsoft Learn). Zoom’s article on Zoom Rooms joining Teams says the meeting appears only on the room’s first display, wired and wireless HDMI sharing aren’t available, and the web client join is only supported in rooms with a single camera, microphone and speaker (Zoom support).

For a room people use to present to customers, “you can join but you can’t share” is often the same as “it doesn’t work.” So most mixed-platform rooms rely on one of two workarounds.

BYOD and BYOM

In a bring-your-own-device or bring-your-own-meeting room, the camera, microphones, speakers and display connect to a laptop over USB, usually through a single cable or a switcher at the table. The person runs the meeting in their own Teams, Zoom, Webex or Meet app, with every native feature that platform offers, while the room provides the audio and video. Zoom describes the same pattern in its interoperability guide, and Microsoft’s Pro Management Portal now tracks BYOD rooms and their peripherals.

It works with any platform, which is why so many of my clients use it. The trade-off is that the meeting depends on someone’s laptop: the right audio and video devices selected, enough performance to run the call, and no one-touch join from the room calendar. And the room has to be designed for it, with USB switching between the room system and the laptop.

Third-party interop services

The other route is a paid service that joins the room to the other platform over SIP, which gets around most of the guest-join limits:

• Teams Rooms into Zoom (and Webex or Google Meet): Microsoft’s “cross-platform meetings via SIP” option, with HDMI content sharing, two displays and up to 1080p. It needs a Teams Rooms Pro licence and a paid SIP dialing plan from a partner such as Pexip (Microsoft Learn).
• Zoom Rooms into Teams: Cloud Video Interop (CVI). Microsoft certifies three partners: Pexip, Cisco with Webex Video Integration for Microsoft Teams, and HP with Poly CloudConnect, which is powered by Pexip (Microsoft Learn). Pexip also packages this for Zoom Rooms as Pexip Connect for Zoom Rooms.

If the two platforms close the content-sharing and dual-display gap natively, a paid interop service becomes harder to justify for Teams-to-Zoom meetings, and fewer meetings will need to fall back to someone’s laptop.

What hasn’t been said yet

Before anyone rewrites a room standard around this, note the gaps in what has been published:

• No Microsoft dates. Zoom’s H1 2027 applies to its own side. Microsoft hasn’t given a timeline for Teams Rooms.
• No licensing details. Neither post says whether any of this depends on a particular room licence tier. Today, Direct Guest Join works on Teams Rooms Basic and Pro, while the SIP route needs Pro.
• Not every feature on every device. Microsoft says capabilities depend on support from both the room system and the meeting platform, and that the work “does not extend every enhancement to every platform.” Your specific room models matter.
• A guest is still a guest. Microsoft is explicit that a guest meeting will still differ from a native meeting. Read-only chat and a limited set of synced controls are good improvements, not parity.
• It’s Teams and Zoom only. Webex and Google Meet invites aren’t part of this announcement.

What to do now

Look at your interop contracts

If you pay for a third-party service so Teams Rooms can work properly in Zoom meetings (or the reverse), check the renewal date and term. Avoid locking into a multi-year commitment without an exit point around mid-to-late 2027. Equally, don’t cancel early. Until the features ship and you’ve tested them on your hardware, the service you have is the one that works.

Keep BYOD/BYOM in your room designs

Even when Cross-Platform Meeting Connect ships, BYOD/BYOM will still be the only way to get a platform’s full native features in a room that doesn’t run it, and the fallback for every other platform. If your new rooms are being designed without a laptop connection to the room’s camera and audio, reconsider.

Fix the basics of Direct Guest Join

A lot of cross-platform pain has nothing to do with the room. If the room’s resource mailbox rejects external invitations, or deletes the invite body, the room never sees a join link. Microsoft and Zoom both document the same two settings on the room mailbox, set with Set-CalendarProcessing: ProcessExternalMeetingMessages on, and DeleteComments off (Microsoft Learn, Zoom support). Microsoft also warns that third-party email security tools that rewrite URLs can break the join link, and lists the Zoom domains to exclude. Check these with your Exchange admin now. It pays off today and it’s a prerequisite for whatever ships next.

Build a test matrix before the features land

When Cross-Platform Meeting Connect starts rolling out, you’ll want answers quickly. Prepare a short list:

• Each room model you run, on each platform.
• Both directions: Teams Rooms into Zoom meetings, Zoom Rooms into Teams meetings.
• Single and dual display rooms.
• HDMI sharing, roster, chat visibility, and whether mute and end-call stay in sync with the table controls.
• Video quality on your real network, since Microsoft notes resolution depends on network conditions.

Talk to your network and security teams

A room that joins both platforms needs both platforms’ services reachable from the room network. Microsoft notes that Direct Guest Join connects the room straight to the other platform, so firewalls and web filters need to allow that traffic without authentication. If your room VLAN or proxy rules were written for one platform only, guest joins to the other may already be degraded. Review those rules alongside the vendor’s published network requirements.

What this means for your rooms

• Mixed-platform rooms are getting easier, and the two biggest vendors are now working on it together rather than leaving it to third parties.
• Don’t change your standard yet. Plan for H1 2027 at the earliest on the Zoom side, and wait for Microsoft’s dates.
• Keep BYOD/BYOM. It stays the most flexible option for any platform.
• Use the time well: fix mailbox settings, line up contract renewals, and have a test plan ready.

Plan your rooms around what ships, not what’s announced. This one looks promising, and it’s worth being ready for it.

If you’d like a second pair of eyes on your mixed-platform rooms, interop contracts, or Direct Guest Join setup, get in touch.

Sources: Microsoft Tech Community, Zoom News, Third-party meetings on Teams Rooms, Cloud Video Interop for Microsoft Teams, Using Zoom Interop for Microsoft Teams in Zoom Rooms.