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115115
116116### Read access
117117
118| Permission | What it lets Claude do |
119| --------------------------------- | --------------------------------------------------------------------------- |
120| `Mail.Read` (Default) | Read the member's mail |
121| `Mail.Read.Shared` (Default) | Read mail in mailboxes shared with the member |
122| `Calendars.Read` (Default) | Read the member's calendar events |
123| `Calendars.Read.Shared` (Default) | Read events on calendars shared with the member and find free meeting times |
124| `Files.Read.All` (Default) | Read files the member can open in OneDrive and SharePoint |
125| `Sites.Read.All` (Default) | Read SharePoint site content the member can open |
126| `Chat.Read` (Default) | Read the member's Teams chats |
127| `OnlineMeetings.Read` (Default) | Read the member's online meetings |
128| `MailboxSettings.Read` | Read the member's mail rules and automatic-reply settings |
118| Permission | What it lets Claude do |
119| --------------------------------- | ------------------------------------------------------------------------------------------------------------ |
120| `Mail.Read` (Default) | Read the member's mail |
121| `Mail.Read.Shared` (Default) | Read mail in mailboxes shared with the member |
122| `Calendars.Read` (Default) | Read the member's calendar events |
123| `Calendars.Read.Shared` (Default) | Read events on calendars shared with the member and find free meeting times |
124| `Files.Read.All` (Default) | Read files the member can open in OneDrive and SharePoint |
125| `Sites.Read.All` (Default) | Read SharePoint site content the member can open |
126| `Chat.Read` (Default) | Read the member's Teams chats |
127| `OnlineMeetings.Read` (Default) | Read the member's online meetings |
128| `MailboxSettings.Read` | Read the member's mailbox time zone so that dates in requests follow the member's local time rather than UTC |
129129
130130### Read access requiring administrator approval
131131
from line 150
150150| `ChatMessage.Send` | Send messages in the member's existing Teams chats |
151151| `ChannelMessage.Send` | Post messages to Teams channels |
152152| `Chat.Create` | Start new Teams chats |
153| `MailboxSettings.ReadWrite` | Manage the member's labels, mail rules, and automatic replies |
153| `MailboxSettings.ReadWrite` | Create and delete the member's mail rules, manage labels, and configure automatic replies |
154154
155155<Note>
156156 Removing a permission from the **Access** picker changes what Claude Desktop requests the next time a member signs in, but it does not revoke permissions that Microsoft Entra has already approved for the application. To revoke a permission entirely, remove it in the Entra admin center under **Enterprise applications** > your application > **Permissions**.