Migrating From Skype for Business to Teams: A Monitoring Checklist for IT Teams

Key takeaways

• Skype for Business is no longer supported in any form as of October 2025, which changes the urgency for any migration still in progress.
• A migration checklist and a monitoring checklist are two different documents — most teams only build the first.
• Before cutover, validate network readiness, capture a call quality baseline, and map SharePoint and OneDrive content before touching it.
• During cutover, watch quality wave-by-wave, verify data integrity in transit, and track helpdesk tickets by migration wave, not just in aggregate.
• After cutover, ownerless teams, stalled adoption, and quality regressions under full load tend to surface weeks later, not on migration day.
• A migration tool like Sharegate moves your data. It does not tell you whether the destination environment is actually performing once the move is done.

Skype for Business's retirement is no longer a future event

Skype for Business Online retired in July 2021. Extended support for the on-premises Server 2015 and 2019 editions ended October 14, 2025, so there is currently no version of Skype for Business still receiving security updates.

If your organization is still planning or midway through a Skype for Business to Teams migration today, you are most likely in one of three situations: you inherited a Skype for Business environment through a merger or acquisition, you are running Skype for Business Server past its support window because the migration kept slipping down the priority list, or you are consolidating a multi-vendor unified communications estate and Skype for Business is the last legacy piece.

None of these situations are unusual, and none of them mean the migration has been mismanaged. But they share the same underlying risk: the environment you are migrating away from is unpatched, and the platform you are migrating to has to absorb years of accumulated technical debt — old permissions structures, undocumented integrations, and SharePoint sites nobody on the current team remembers creating.

That changes what successful migration actually means here. It is not just whether the data moved. It is whether IT can see what is happening across both platforms clearly enough to catch a problem before a user reports it.

What a migration checklist misses

Most Skype for Business to Teams migration guides walk through the technical steps: tenant configuration, user provisioning, and data porting. Few address what happens to visibility during the transition itself.

The distinction matters. A migration checklist tells you what to move and in what order. A monitoring checklist tells you what to watch while you are moving it, and for weeks afterward, when problems that did not show up on cutover day start surfacing in call quality, file access, or user adoption.

Teams using a third-party migration tool such as Sharegate, AvePoint, or BitTitan to handle a Teams tenant-to-tenant migration, or to migrate SharePoint content to Teams, often assume the tool's own reporting covers this. It typically does not. Most migration tools report on transfer completion and error counts, not on how the destination environment performs once the transfer is finished.

That is the gap this checklist is built to close.

Before you cut over: the pre-migration monitoring checklist

What you monitor before migration day determines whether you can later tell the difference between "the migration caused this" and "this was already broken."

• Network readiness: Run bandwidth, jitter, and packet-loss tests across every site moving to Teams.
• Call quality baseline: Capture current Skype for Business call quality metrics, including MOS scores, dropped-call rates, and latency, for every site before cutover.
• SharePoint and OneDrive content mapping: Inventory file sizes, folder depth, and unique permissions before moving content.
• Tenant-to-tenant readiness: Confirm both the source and destination tenants have the licenses, admin access, and DNS configuration your migration tool requires.
• Third-party tool validation: Run a test migration against a representative site or team first and time how long it takes per gigabyte.

During cutover: what to watch in real time

A phased rollout only reduces risk if someone is actually watching each wave before the next one starts.

• Real-time call and meeting quality: Watch MOS scores and connection quality for users who have already moved, not just the ones mid-transfer.
• Data integrity in transit: Verify that membership, permissions, and file references land correctly before decommissioning the source.
• Device and client registration: Confirm client and device registration is succeeding at the rate you expect.
• Helpdesk ticket patterns by wave: Track ticket volume and category by migration wave, not just in aggregate.

After cutover: the checklist most teams stop too soon

The riskiest period for a Skype for Business to Teams migration is not cutover day. It is the six to eight weeks after, once the old environment is decommissioned and there is no fallback left.

• Ownerless teams and groups: Audit for these in the first two weeks, not the first year.
• Adoption, not just access: Track active usage by team or department against your rollout schedule to catch pockets that quietly reverted to email or shadow tools.
• Quality regressions with a delay: Keep the pre-cutover baseline on hand so a regression at week six is diagnosed against real numbers, not memory.
• External access and sharing review: Review guest access and external sharing settings on migrated content regularly.

Monitoring approach: what to look for beyond the migration tool

The migration tool's job ends when the data lands. Monitoring's job does not.

• Consolidated visibility: Coverage across the migration and the destination environment, rather than a separate dashboard for each layer.
• Real-time and historical views: The ability to catch an in-flight problem during cutover and still investigate a regression that surfaces weeks later.
• Multi-vendor coverage: Visibility across Teams alongside platforms already in place, such as Cisco or Avaya.
• Proactive alerting: Thresholds tied to your own baseline rather than generic defaults.

How IR Collaborate can help

IR Collaborate gives IT teams one consolidated view across a Teams migration and the multi-vendor unified communications environment it lands in, powered by Prognosis.

Rather than checking a separate dashboard for network health, another for Teams call quality, and another for the migration tool's transfer logs, IR Collaborate provides near real-time reporting on call and meeting quality, network connectivity, and user activity across Teams alongside other platforms such as Cisco and Avaya in one place.

That consolidated view works whether your environment is on-premises, hybrid, or cloud, which matters for organizations running a Skype for Business Server migration alongside a broader cloud transition rather than a single clean cutover.

Frequently asked questions

Conclusion

Skype for Business's retirement is not news anymore, but for organizations still working through the migration, the risk has not gone away. The technical steps of moving to Teams are well documented. What is less well covered is the discipline of watching the environment closely enough, for long enough, to catch what a migration checklist alone will not show you.

See how IR Collaborate gives IT teams one consolidated view across a Teams migration and the multi-vendor environment it lands in.