Add more documentation for msteams

Gateway-config-(channel-rules).md

@@ -31,6 +31,10 @@ Below you can find how the channels (`protocolchannel` and `protocol2channel`) s
   - `channel_name`
     - the channel name as seen in the URL, not the displayname
     - https://yourmattermostserver/yourteam/channels/channel_name <- channel_name
+- msteams
+  - `channel="19:82caxxxxxxxxxxxxxxxxxxxxxxxx@thread.skype"
+    - as seen in the URL `?threadId=19:82abcxxxxxxxxx@thread.skype`
+    - [more information](MS-Teams-setup#channelid)
 - rocketchat
   - `#channel_name`
     - \# is required (also for private channels)

Section-MSteams-(basic).md

@@ -0,0 +1,13 @@
+You need the  `TenantID`,  `ClientID` and  `TeamID`.
+
+See [here](MS-Teams-setup#get-necessary-ids-for-matterbridge) for more information about how to get those.
+
+For how to configure Microsoft Teams for the matterbridge integration, look [here](MS-Teams-setup)
+
+```toml
+[msteams.teams]
+TenantID="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+ClientID="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+TeamID="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
+RemoteNickFormat="[{PROTOCOL}] <{NICK}> "
+```

_Sidebar.md

@@ -27,6 +27,7 @@
 [[Keybase|Section Keybase (basic)]]  
 [[Matrix|Section Matrix (basic)]]  
 [[Mattermost|Section Mattermost (basic)]]  
+[[Microsoft Teams|Section MSteams (basic)]]  
 [[RocketChat|Section RocketChat (basic)]]  
 [[Slack|Section Slack (basic)]]  
 [[Sshchat|Section Sshchat (basic)]]