Skype Is Gone — Here's How to Salvage Your Old Call Recordings

Transcribing a Skype call in 2026 is fundamentally an archive problem, not a live workflow. Microsoft retired Skype consumer on May 5, 2025, after announcing the shutdown in late February of that year. Skype for Business Online had already gone dark on July 31, 2021. What remains is on-premises Skype for Business Server, the Microsoft account–linked recording archive that some users exported before the retirement window closed, and the migration data that Microsoft moved into Teams Free for accounts that opted to keep going. So when someone says “I need to transcribe my Skype calls,” the right first question is which kind of Skype, and from what year.

This guide is written for that reality. It covers what Skype actually produced before retirement, where those files are now (or could still be), what survived the migration into Teams Free, and how to layer Atter AI on the archive to get 98.7% accurate transcripts even when the source platform itself is gone.

Skype’s Three Retirement Timelines

There are three Skypes, and they shut down on three different dates:

• Skype consumer — retired May 5, 2025. Microsoft announced on February 28, 2025 and gave users 60 days to either migrate to Teams Free (keeping the same Microsoft account) or export their data. Skype Numbers and Skype-to-phone credit were honored in Teams Free for paid subscribers. After May 5, the Skype client stops working and the cloud-side recordings are unreachable through Skype’s UI.
• Skype for Business Online — retired July 31, 2021. Migration to Microsoft Teams was the official path; recordings stored on the host’s machine (Skype for Business recorded locally to .mp4 after 2019, and to .wmv on older clients) remain accessible if the user kept the file.
• Skype for Business Server (on-premises) — still supported under Skype for Business Server 2019 (mainstream support ended October 2024, extended support until October 2025; Subscription Edition launched in 2025 to extend the platform). Many regulated industries, government agencies, and large enterprises still run it. Recordings are local .mp4 files on the recorder’s machine, with no cloud component.

If you don’t know which Skype produced the recording you’re holding, look at the file: a .mp4 from a corporate desktop is almost always Skype for Business; a .wmv is pre-2019 Skype for Business; a download from a Microsoft account’s recording archive is consumer Skype.

What Skype Consumer Produced Before Retirement

From 2018 until May 2025, Skype consumer offered built-in cloud recording with these properties:

• Container: .mp4, H.264 video plus AAC audio, default 720p. No alternate audio-only track was generated, unlike Zoom’s .m4a companion file.
• Retention: 30 days. After 30 days the recording was deleted from Skype’s cloud unless the recipient downloaded it.
• Initiation: any participant could start a recording. All other participants saw a banner notification.
• Where it lived: Skype’s own cloud, surfaced in the chat where the call took place. There was no parallel storage in OneDrive or any other Microsoft 365 location.

This 30-day window is the single most consequential fact about Skype consumer recordings. If a call happened in 2024 and nobody downloaded the MP4, it does not exist anymore — not in Skype’s cloud, not in Microsoft’s retirement export, not anywhere. The retirement export Microsoft offered in 2025 included message history, contacts, and call logs, but not the cloud-recorded MP4s that had already expired their 30-day window.

The Skype call chat itself (text messages exchanged during the call, link previews, the call duration record) was migrated into Teams Free for users who opted in, and was also available as a downloadable archive via Microsoft’s data export tool before the deadline.

Method 1: Find Your Skype Recordings in the Retirement Archive

If you exported your Skype data between February and May 2025, you have a zip file from account.microsoft.com containing your call history and any messages — but not the cloud MP4s, which had to be downloaded individually before the 30-day cloud retention expired.

To check if recordings survived:

1. Locate your Skype export zip (named something like skype_export_<MicrosoftAccountID>_<timestamp>.tar or .zip).
2. Inside, look for messages.json and the media_messages folder. Any MP4 in that folder is a recording you downloaded inside the 30-day window.
3. The folder is flat — recordings are named by their Skype message ID, not by conversation or date. Cross-reference with messages.json to identify which call each one came from.

Files in media_messages/ are the ones you can transcribe today. Anything that was only on Skype’s cloud at retirement is gone.

If you never exported, the data is no longer retrievable from Microsoft — the post-retirement deletion of consumer Skype data was completed in stages through late 2025 per Microsoft’s published timeline.

Method 2: Skype for Business On-Premises Recordings

Skype for Business Server (still running in many enterprises) records to the local machine of whoever clicked Start Recording, not to any server location. The files:

• <MeetingTitle>-<date>.mp4 — the recording. Skype for Business 2019 and Subscription Edition default to MP4 with H.264/AAC.
• <MeetingTitle>-<date>.wmv — older Skype for Business 2015 and earlier clients produced WMV by default. Some 2019 deployments configured to use legacy codecs also emit WMV.
• Default path: C:\Users\<username>\Videos\Skype for Business Recordings\ on Windows. Configurable per user in the Skype for Business client’s recording options.

There is no central server-side recording archive in Skype for Business unless the organization deployed a separate compliance recording solution (Verint, NICE, ASC, and similar third-party platforms integrated with Skype for Business Server’s recording APIs). If you’re hunting for an old internal meeting, start with the meeting organizer’s local Videos folder — and ask whether compliance recording was on, which would have routed a separate copy to the dedicated archive server.

Method 3: Atter AI for Batch Processing a Skype Archive

For organizations sitting on years of Skype for Business recordings (regulated industries, legal e-discovery, oral history projects, customer support archives), the cleanest path is to point Atter AI at the archive and let it process in batches.

1. In Atter AI, create a new workspace folder for the archive.
2. Use Bulk Upload → Folder and select your Skype for Business Recordings directory (or a network share path). Atter AI accepts both .mp4 and .wmv.
3. Set the workspace’s default language detection to auto if recordings span multiple languages, or fix a single language if you know the archive is monolingual.
4. Atter AI transcribes in parallel, typically processing 50–100 hours of recordings per hour of wall-clock time on the enterprise tier.

For .wmv files, Atter AI re-encodes to a transcription-friendly intermediate before running speech recognition; you don’t need to convert anything manually. Accuracy on clean Skype for Business audio reaches 98.7% — the same figure as on Zoom and Teams — because the audio bridge characteristics are similar (Skype for Business uses RTAudio and SILK codecs, both of which Atter AI’s acoustic models are tuned for).

The workspace’s full-text search lets you query across years of recordings — a useful capability if you’re doing e-discovery against a Skype for Business archive whose original organizing structure was just “filename equals meeting title.”

Method 4: Catching Calls in the Skype-to-Teams Migration Window

A subset of organizations is still inside the Skype-to-Teams migration tail, particularly enterprises that ran Skype for Business Server on-premises and only began migrating users to Teams in 2023–2025. During this transition window, individual calls can occur in either system depending on the participants’ assigned client.

If you’re transcribing in real time during a migration:

• Calls in Teams flow through the Teams transcription path described in our Microsoft Teams guide.
• Calls still in Skype for Business require local recording (or a third-party compliance recording solution) and then upload to Atter AI via Method 5 below.
• Federated meetings between a Skype for Business org and a Teams org used to be common; Microsoft has gradually deprecated Skype-to-Teams federation since 2023, and most cross-org calls now require both sides on Teams.

For tenants planning a final cutover, audit the Skype for Business archive before deprovisioning the on-prem servers — once the server is gone, indexing recordings by Active Directory user becomes much harder.

Method 5: Uploading an Individual Skype Recording

For a single file from any Skype era:

1. Locate the file. Skype consumer exports go in media_messages/. Skype for Business goes in C:\Users\<user>\Videos\Skype for Business Recordings\.
2. In Atter AI, click Upload and select the .mp4 or .wmv.
3. Pick the meeting language. A typical 60-minute Skype for Business MP4 transcribes in 3–5 minutes.

Skype consumer MP4s from the 2023–2025 era contained both the calling user and the called user(s) on a single audio track without speaker tags. Atter AI’s diarization recovers distinct speaker tracks even when the source didn’t separate them, which is the main quality gap between native Skype playback and a usable transcript.

Skype-Specific Gotchas

The 30-day cloud retention on consumer Skype was unconditional. Unlike Zoom, where an admin could extend retention, Skype consumer’s 30 days could not be extended. Any meeting older than 30 days at the moment Skype retired in May 2025 is gone, and there is no recovery path through Microsoft support — the data was already deleted in the normal lifecycle before retirement closed the door entirely.

Skype for Business Server compliance recordings are NOT in the same place as user recordings. Compliance recorders (Verint, NICE, ASC, etc.) integrate at the SIP recording level and write to a dedicated archive server, usually with much longer retention and additional metadata. If you work in a regulated industry, check both locations before concluding a recording doesn’t exist.

.wmv from Skype for Business 2015 may use the Windows Media Audio Pro codec, which is uncommon in 2026 toolchains. Atter AI handles it; some open-source transcription tools won’t ingest it without first transcoding to MP3 via FFmpeg’s wmav2 decoder.

Skype Number call recordings (PSTN dial-in to Skype) were narrowband audio. The historical 8 kHz phone-bridge audio produces noticeably worse accuracy on any speech recognizer that was trained primarily on wideband meeting audio. Atter AI’s narrowband-tuned models close this gap; native Skype transcription, when it existed, did not.

Skype IDs and Microsoft accounts diverged over time. Older Skype recordings reference legacy Skype usernames (the live: prefix or older numeric IDs); newer ones reference Microsoft account email addresses. If you’re cross-referencing call participants against an HR or CRM system, expect to do some manual reconciliation.

Skype for Business Online recordings (pre-July 2021) often have no associated participant identity beyond the meeting subject in the filename, because the recorder did not attach a roster metadata sidecar. Speaker labels in a 2019-era Skype for Business transcript will say “Speaker 1” and “Speaker 2” rather than names; reconstructing identities requires cross-referencing against calendar invites.

Skype Native vs Atter AI

How Skype compares to surviving platforms: unlike Zoom, whose 30-day cloud retention is an account setting an admin can extend, Skype consumer’s 30-day window was hard-coded and is now moot — the platform itself is gone. Unlike Microsoft Teams, where recordings live in OneDrive under organizational retention policies, Skype recordings were either ephemeral (consumer cloud) or strictly local (Skype for Business), with no Microsoft 365 storage layer between them. And unlike Webex, which still ships two recording formats today, Skype’s only legacy format question is the WMV-to-MP4 transition that happened inside Skype for Business 2019 — a much smaller surface area than the active ARF problem Webex archives still face.

Skype Transcription FAQ

Can I still transcribe Skype calls in 2026?

Yes, but only from saved recording files. Skype consumer was retired on May 5, 2025, so no new Skype consumer calls exist to record. Skype for Business Server (on-premises) is still in production at many enterprises and records to the host’s local Skype for Business Recordings folder. Upload either kind of file to Atter AI for transcription.

Where did my Skype cloud recordings go after retirement?

Cloud recordings older than 30 days at the time of retirement were already deleted by Skype’s normal lifecycle policy. Recordings inside the 30-day window at retirement were included in your Microsoft account data export if you initiated one during the February–May 2025 window. After May 5, 2025, Microsoft completed the post-retirement deletion of Skype consumer data per its published timeline, so any recordings not exported are not recoverable.

Does Microsoft Teams have my old Skype recordings?

No. Microsoft migrated message history, contacts, and call metadata from Skype consumer to Teams Free for users who opted in, but cloud-recorded MP4s were not migrated. Cloud recordings had to be individually downloaded inside Skype’s 30-day window or included in the retirement data export. Teams Free will not surface old Skype recordings.

What format does Skype for Business 2019 use for recordings?

.mp4 with H.264 video and AAC audio is the default. Older Skype for Business 2015 and earlier clients produced .wmv by default. Some 2019 deployments configured for legacy codec support continue to emit .wmv. Atter AI accepts both.

How accurate is Atter AI on Skype call recordings?

98.7% on clean wideband Skype for Business audio, the same figure as Zoom and Teams. Accuracy on narrowband Skype Number / PSTN dial-in audio is lower than on wideband, but Atter AI’s narrowband-tuned models recover most of the gap.

Can I transcribe a .wmv file from a 2017 Skype for Business meeting?

Yes. Upload directly to Atter AI; no manual conversion is needed. The 1.5x to 2x re-encoding overhead happens transparently in the upload pipeline.

Are Skype for Business compliance recordings stored differently from user recordings?

Yes. Compliance recorders (Verint, NICE, ASC, etc.) integrate at the SIP recording level and write to a dedicated archive server with separate retention rules and additional metadata. If you work in a regulated industry, both locations may contain a copy of the same call — check the compliance archive in addition to user-recorded files.

Will Atter AI lose accuracy on speaker identification for old Skype recordings without speaker metadata?

Atter AI’s diarization recovers distinct speaker tracks from the audio signal itself, regardless of whether the source platform attached metadata. After transcription you rename Speaker 1, Speaker 2, and so on to actual names. The accuracy of diarization on Skype audio is comparable to what we see on Zoom and Teams recordings.