Check who can still read the chat after the coaching call
Microsoft Teams specifies that up to 1,000 attendees will have permanent access to the meeting chat when the meeting ends, according to Microsoft.
Key takeaways for who can still read the coaching chat
- Teams chat access: Up to 1,000 attendees have permanent access to the meeting chat when the meeting ends, according to Microsoft.
- Google Meet limit: Participants can use continuous meeting chat for new Google Calendar meetings with up to 200 invited guests, including Google Groups, according to Google.
- Slack confirmation: In channels with at least six members, Slack asks you to confirm before sending a message with specific mentions, according to Slack.
- Mattermost warning: From Mattermost v10, the platform warns you when a direct message recipient is set to Do Not Disturb or their local time is from 10PM to 6AM, according to Mattermost.
This limit applies specifically to the meeting chat feature within Microsoft Teams. The 1,000-person figure represents the maximum number of attendees who keep permanent access to the chat after the meeting ends.
This permanent access rule is distinct from temporary access rules that may apply during the meeting. The source document ties this specific 1,000-attendee limit to the state of the meeting after it has ended. You should verify whether your coaching call falls under this specific Microsoft Teams configuration before relying on the chat for post-meeting reference. The quote explicitly states "Up to 1,000 attendees will have permanent access to the meeting chat when the meeting ends," according to Microsoft.
Do not assume this limit applies to other platforms or different meeting types. The scope of this fact is restricted to the named publisher page for Microsoft Teams meeting chat access. If your coaching session uses a different tool, this specific 1,000-attendee permanent access rule does not apply. Check your specific tool's documentation for its own post-meeting chat retention limits.
Check these limits before you assume the coaching thread stays visible to everyone. The number of people who can read the chat after you hang up depends on the tool you use. If you use Microsoft Teams, the chat remains accessible to a large group of attendees even after the call concludes. Specifically, up to 1,000 attendees will have permanent access to the meeting chat when the meeting ends, according to Microsoft.
How many people keep the chat after the meeting
The number of people who can read the chat after a coaching call depends on how the meeting was scheduled and which platform you use. For Microsoft Teams, the "Access meeting chat in Microsoft Teams" page defines specific limits for permanent and temporary access. Understanding these distinctions helps you decide if the chat is a safe place for sensitive coaching notes or if you need to move the conversation to a more private channel. See Coaching survey privacy: 4 checks before you promise.
In a meeting series, up to 750 people invited to the series will have permanent chat access at the time the series is scheduled, according to Microsoft. For a repeating series, see Recurring sales practice: 5 checks to schedule.
For single-instance meetings, the rules differ slightly regarding contact lists. In single-instance meetings, members of contact lists that exceed 150 people will have permanent chat access after they join the meeting, according to Microsoft.
In a meeting series, all members of contact lists that exceed 150 people will have temporary chat access while they’re in the meetings, according to Microsoft. This is a critical distinction for recurring sessions. If you invite a large contact list to a recurring coaching series, those members can only read the chat while they are actively in the meeting. Once they leave, they lose access to the thread. This is different from the 750-person limit for people invited to the series, who have permanent chat access at the time the series is scheduled.
When a mention asks you to confirm
Mention rules vary by platform and channel size, so check the specific limit before you type a notification. In Slack, the confirmation prompt appears based on the number of people in the channel. According to Slack, in channels with at least six members, the system will ask you to confirm before you send a message with any of these mentions. This applies to standard channels where you might tag a teammate for coaching feedback. If your coaching channel has fewer than six people, this specific confirmation step does not trigger under that rule.
For larger groups, the restriction on who can use broad mentions changes. According to Slack, if there are 10,000 members or more, only owners and admins can use @channel and @here. This means that a front-line manager who is not an owner or admin cannot use these specific tags to wake everyone. You would need to use specific user mentions or other methods to notify individuals in such a large group.
Slack also has rules about who can post in channels. According to Slack, if you are choosing specific people, you can select up to 100 in one channel. This limit applies when you are restricting posting permissions to a specific list of users. If your coaching channel has more than 100 people who need to post, you cannot select them all in that specific permission setting.
Channel management roles also have limits. According to Slack, owners, admins, and Channel Managers can assign up to 100 Channel Managers for channels they are a member of. This feature is available in channels with 50+ people, according to Slack. If you are using Channel Managers to help moderate a large coaching channel, remember that the feature requires a minimum of 50 people in the channel.
Google Meet has a different constraint related to chat availability. According to Google, participants can only use continuous meeting chat for new meetings created in Google Calendar with up to 200 invited guests, including Google Groups. This is a hard limit for the continuous chat feature. If your coaching session involves more than 200 invited guests, you cannot use continuous meeting chat for that new Calendar meeting. You would need to use a different method for sharing notes or links during the call if you exceed this guest count. See Timestamped call notes: 5 fields before you post.
Filled reference table of chat limits by publisher
The table below lists access and mention limits from Microsoft, Google, and Slack.
| Publisher | Chat Size or Mention Limit | Scope or Condition |
|---|---|---|
| Microsoft Teams | Up to 1,000 attendees | Permanent access to the meeting chat when the meeting ends, according to Microsoft. |
| Google Meet | Up to 200 invited guests, including Google Groups | Participants can only use continuous meeting chat for new meetings created in Google Calendar, according to Google. |
| Slack | At least six members | Slack will ask you to confirm before you send a message with any of these mentions, according to Slack. |
Quiet-hours warnings before you send the note
When you send a direct message in Mattermost v10, the platform warns you if the recipient’s availability is set to Do Not Disturb. It also warns you when the recipient’s local time is outside of regular business hours, specifically from 10PM to 6AM, according to Mattermost. These warnings give you a chance to reconsider the timing.
Direct messages update the numbered badge count and trigger a notification unless the direct message is muted, or your notifications are disabled, according to Mattermost. Group messages always display a new message badge, according to Mattermost.
If you are managing a private channel, channel members can choose to leave private channels at any time, according to Mattermost. This affects who remains in the conversation and who might see future notes. For organizations using Mattermost Enterprise and Professional, you can restrict channel management to system and channel admins, according to Mattermost.
Before sending a note to a rep in a different time zone, check their local time against the 10PM to 6AM window. If the warning appears, consider waiting until their business hours. This prevents waking someone during their quiet time. You can also verify if the channel is private and if members have the ability to leave.
Illustrative example of a coaching chat check
A series is scheduled with 750 people invited at the start. Compare that 750 with permanent chat access for people invited to a series. A one-time meeting uses a contact list of 200 people. That list exceeds 150, so use the contact-list rule after they join. At 10,000 members, only owners and admins can use the broadest mentions. A direct message sent at 10PM falls in the quiet-hours window that runs to 6AM.
Check your tool before the next coaching chat
Check the specific tool you are using before you rely on the thread. Match your invite count to that tool's access or mention rule before the note goes out.
Coaching chat limit FAQ
How many people keep a Teams meeting chat after the meeting ends?
Up to 1,000 attendees will have permanent access to the meeting chat when the meeting ends, according to Microsoft. This limit applies specifically to the access state of the chat once the session concludes. You should verify your specific meeting configuration against this threshold before relying on the thread for post-call reference.
How many invited guests can use Google Meet continuous chat?
Participants can only use continuous meeting chat for new meetings created in Google Calendar with up to 200 invited guests, including Google Groups, according to Google. This restriction defines the maximum guest count for the continuous chat feature on new Calendar meetings. Check your invite list against this 200-guest cap to ensure the chat remains available for your coaching session.
When does Slack ask you to confirm a channel mention?
In channels with at least six members, Slack will ask you to confirm before you send a message with any of these mentions, according to Slack. This confirmation step triggers specifically when the channel size reaches or exceeds six members. Review your channel membership count before sending a mention to anticipate this verification prompt.
Who can use @channel when there are 10,000 members or more?
If there are 10,000 members or more, only owners and admins can use @channel and @here, according to Slack. This rule restricts the ability to send these specific broad mentions to a small subset of users. Confirm your role in the channel if you expect to use these mentions.
When does Mattermost warn that a direct message is outside business hours?
From Mattermost v10, when sending a direct message, Mattermost warns you that the recipient's availability is set to Do Not Disturb, and when the recipient's local time is outside of regular business hours (from 10PM to 6AM), according to Mattermost. This warning appears based on the recipient's local time zone and availability settings. Check the recipient's local time before sending a direct message to see if this warning will appear.