According to https://docs.microsoft.com/en-us/graph/api/resources/teamsapp?view=graph-rest-beta, only delegated permission is supported to manipulate Teams AppCatalog which means a sign-in user is needed when taking use of those APIs. However, the Application permission can provide the ability to make related actions more automatically and support more meaningful and realistic use-cases.

For example, my use-case is to provided an application to automatically install a new Bot, created in Azure, to Teams. So I really think the Application permission is needed.

In the current graph beta, user chats and their messages can be enumerated using GET /users/{id}/chats and GET /users/{id}/chats/{id}/messages. However, new messages cannot be posted to the messages endpoint i.e POST /users/{id}/chats/{id}/messages . Please add this functionality.

The desired functionality exists for team channel messages by posting to the channel messages endpoint (POST /teams/{id}/channels/{id}/messages). Replicating this for user chats using the same json payload would seem to be the most appropriate solution.

I have a scenario where when a user saves a message I want to see those messages and list them in an application.

With the announcement at Ignite 2019 of Pinned Channels it would be great if we could get access to them via the Graph API. You could add a property to the Channel called 'isPinned' and/or make a call to get all pinned channels in one hit e.g. me/pinnedChannels

Please allow access to read and update user presence via API.

Currently, the only way to send messages is to post a message on a channel in a team. It would be great if there could be an API to send a direct message to the users. Please let me know if it already exists, because I could not find any such method in the chat object here :
https://docs.microsoft.com/en-us/graph/api/resources/teams-api-overview?view=graph-rest-beta

support delete message and edit message.

We have schema extensions on the Group resource to add metadata to user's Teams. We currently need to call both the /me/joinedTeams and then make time consuming calls to the /groups API in order to fetch the schema extensions for all the Teams that the user is joined to.

It would be of great help if we could fetch the Schema Extensions directly on the /me/joinedTeams endpoint.

It would be even better if we could also $filter the joinedTeams to only return the Teams that have a particular schema extension.

The response object when listing channel messages or getting a specific message, should give the total number of replies.
This way, we don't have to fire a potentially heavy request just to be able to use this property.

When adding a custom SPFx teams app to a team using graph, it should be possible to complete the configuration from code so that the user is not required to complete the configuration.

Support add reactions to message Graph API

Currently if we want to get driveItem for all channels in the team we need to do one request to get channels first and then separate requests (or batch) to get filesFolder information for each of the channels.
It would be great if /filesFolder result (or its part) was included in channel information or we could $expand on the filesFolder.

Currently Our project is using the API (mentioned bellow) to read all the messages of particular channel of MS Team

https://docs.microsoft.com/en-us/graph/api/channel-list-messages?view=graph-rest-beta

it is ok to hit this API for small conversation but as the conversation becomes lengthy( by the time), then the API takes long to retrieve the message. So please provide enable the filter to retrieve the teams messages by date filter.

There are filter which can already be applied to message(on mail ) and people.
Can this filter will also be enabled for channel messages for MS Teams.

When archiving a Team (https://docs.microsoft.com/en-us/graph/api/team-archive?view=graph-rest-1.0) there is an optional parameter shouldSetSpoSiteReadOnlyForMembers to change all user permissions on the content to read-only. This however does not currently work when using Application permissions.

This should be supported, possibly requiring the Sites.ReadWrite.All application permission.

This will allow us to archive a team automatically in a background process in response to certain business requirements eg. time elapsed, team status etc.

We are integrating Microsoft Teams threaded chat into our product offering. Our users will interact with the channel-based chat using both the Microsoft Teams application and from within our application. To avoid polling, we would like to be able to subscribe to Microsoft Teams related events. Of interest are events related to new channel messages. We found similar subscriptions for files and email, but nothing related to Microsoft Teams.

See documentation for /subscription endpoints, Change notifications: "Use the Microsoft Graph API to get change notifications"

Customers would like the ability to delete channel or chat messages either through the Graph API or through a retention policy in Security and Compliance center.

At the moment, only archive teams are there. In some cases, the teams is still active but some channels within that teams is inactive. Requesting an API to archive/hide/show inactive channels.