How to Create a Webinar Attendance Report with AI: Complete Guide
A webinar attendance report turns registration and attendance exports into one view of who showed up, how long they stayed, and what to do next. The platform gives you a file per event. Turning several of those files into a trend is the part left to you. This guide covers both routes.
What a webinar attendance report answers
The raw export answers one question: who was in the room. A useful report answers four.
- Show-up rate. What share of registrants actually attended.
- Retention through the session. When people left, and whether it clusters around a moment.
- Segment differences. Whether customers behaved differently from prospects.
- Trend across events. Whether last month's change to the invite helped.
Only the first two are visible in a single event's file. The other two need several files joined, which is why this job is more than a download.
What you need before you start
Two exports per event, and they live in different places.
- The registration report, which covers people who signed up.
- The attendance report, which covers people who joined.
Microsoft's documentation separates them clearly. Registration reporting shows "how many people viewed the registration site, registered for the event, or canceled their registration." Attendance reporting covers what happened during the event itself.
You also need a consistent identifier across events. Email address is usually the only field that survives, so keep it in every export.
One more thing helps before you start: the run of show for each event, with timings. Without it, a drop in the retention curve is a number rather than a cause.
What the platform actually gives you
It is worth knowing exactly what is in the file before designing a report around it.
Microsoft's webinar reports page lists exactly what an attendance report contains:
- Event start and end time
- Attendee roles
- Total duration of the event
- First join and last leave times
- Number of attendees
- How long each attendee stayed in the event
The attendance report page covers access. Organizers and co-organizers "can view and download attendance reports in the event chat about five minutes after the event ends." From there you "select Download to download the attendance report as a .csv file."
Three constraints in that documentation shape the work.
One report per occurrence. The page states that "recurring meetings will have a unique attendance report for each instance of the series." A monthly webinar series is a folder of separate files, not one dataset.
Reports are tied to the organizer. Microsoft notes that "if the event organizer leaves the org, reports are permanently deleted and can't be retrieved."
Attendees can opt out of identification. The same page documents a privacy setting for hiding your identity in attendance reports, so your file may legitimately be incomplete.
None of this is a flaw. It simply means the cross-event view has to be assembled somewhere else.
How to build the report manually
Option 1: Read one event's file as it comes
Open the downloaded file and read the attendee list and durations. For a single event with a small audience, this is enough.
It stops working the moment someone asks how this month compares with last month.
Option 2: Join registration and attendance in a spreadsheet
Put both exports in one workbook and match on email address to calculate a show-up rate. This is the first genuinely useful version of the report.
The friction is in the matching. Registration captures whatever address someone typed, attendance captures the account they joined with, and the two disagree more often than you would expect.
Option 3: Stack several events into one table
Add an event name and date column to each file, append them, and analyse the stack. Now trends and segments are available.
This is the right structure and the tedious one. Every new event means another download, another two files, and another append, which is exactly the kind of monthly chore that gets skipped.
How to create a webinar attendance report with AI
Step 1: Upload every export for the period
Open Powerdrill Bloom and upload the registration and attendance files for all the events you want covered. Upload them together rather than one at a time.
Then say, in natural language, which file belongs to which event and which column holds the attendee identifier. Two sentences of context prevent most of the joining problems later.
Step 2: Ask for the joined table before any chart
Ask for one row per registrant per event, carrying registration status, whether they attended, minutes attended, and the event date. Ask to see how many registrants failed to match an attendance record.
That unmatched count is the quality check. A small number is normal, because people register with one address and join with another. A large one means the join needs a different key.
Only after the table looks right should you ask for the summary numbers.
Step 3: Ask for the four views, then export
Request show-up rate by event, a retention curve using join and leave times, a segment breakdown, and a trend across the period. The pricing page describes the output as a grounded answer with "charts, tables, and exports."
Export the result and keep the joined table, not only the summary. Next quarter's report is far cheaper if this quarter's table still exists.
The numbers that belong in the report
| Metric | How it is derived | Why it matters |
|---|---|---|
| Registrants | Registration export | The denominator for everything else |
| Attendees | Attendance export | The headline number people ask for |
| Show-up rate | Attendees divided by registrants | The only number that judges the invite |
| Median minutes attended | Attendance duration field | Distinguishes a visit from a session |
| Drop-off point | First join and last leave times | Points at a specific moment in the run of show |
| Replay-only audience | Registrants with no attendance record | Often the largest group, and usually ignored |
| Trend by event | Several events stacked | The only view that shows whether anything improved |
Median rather than mean matters here. A handful of attendees who left the session open all afternoon will pull an average upward and hide a short session.
Best practices and common mistakes
Report the show-up rate, not the attendee count. A larger audience from a much larger registration list is not an improvement.
Do not treat a no-show as a failure. Many registrants intend to watch the recording, so follow-up should differ by group rather than treat everyone the same.
Download promptly. Because reports are tied to the organizer's account, waiting for a departing colleague to run the export is a risk worth avoiding.
Keep the run of show next to the retention curve. A drop at minute 18 only means something if you know what was on screen at minute 18.
Standardise event naming before you stack files. Inconsistent names are the single most common reason a trend chart looks wrong. Agree a naming pattern once, and apply it when the file is downloaded rather than later.
Feed the result back into the invite. Our guide on handling event management data covers the operational side, and our roundup of event and webinar analytics tools covers the wider tooling landscape.
If the output becomes a recurring deliverable, the AI report generator page shows that shape. Our walkthrough on building a KPI dashboard from a spreadsheet covers the standing view.
Conclusion
The platform hands you an accurate record of one event. The report your team actually wants compares several events and joins registration to attendance, and that assembly is the whole job.
Do the join first, check the unmatched count, then calculate. Keep the joined table so the next report starts from an hour of work rather than a day.
Have a folder of exports from the last quarter? Try Powerdrill Bloom and stack them into one view.
Frequently asked questions
What is in a webinar attendance report?
Microsoft's documentation lists event start and end time, attendee roles, and total duration. It also lists first join and last leave times, the number of attendees, and how long each attendee stayed.
How soon can I download the report?
About five minutes after the event ends. Microsoft's page states that organizers and co-organizers can view and download attendance reports in the event chat at that point, as a .csv file.
Does a webinar series produce one report or several?
Several. The documentation states that recurring meetings have a unique attendance report for each instance of the series. A series therefore has to be stacked before any trend is visible.
Why is my registrant list longer than my attendee list?
Because registration and attendance are different actions. The gap is your show-up rate, and a large share of the difference is usually people who intend to watch the recording.
Can attendees be missing from the report?
Yes. Microsoft documents a privacy setting that lets a person choose not to be identified in attendance reports, so a file can be legitimately incomplete.