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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 89%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EST%3C/text%3E%3C/svg%3E)
Hi,
We saw that "meetingStage" is enabled in the latest developer preview but it is not visible for us. We use the latest Teams desktop version on Windows 10 and OSX too. (In meetingSidePanel our tab app is visible) We use context :
"scopes": [
"team",
"groupchat"
],
"context":[
"channelTab",
privateChatTab",
"meetingChatTab",
"meetingDetailsTab",
"meetingSidePanel",
"meetingStage"
]
If we upload the manifest file to App studio and check it in App Manifest preview "meetingStage" changes to null.
Any idea why the "Share button" is not visible like in the documentation? 
We see "meetingSurfaces" settings in v1.9 JSON schema https://developer.microsoft.com/en-us/json-schemas/teams/v1.9/ but if we use it the tab is not visible in meetingSidePanel.
Thank you
Br
Sandor
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 24%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
As we are mainly responsible for general question of Microsoft Teams, your question related to development is not supported by us. I will remove office-teams tag from your thread. Thanks for your understanding.
Besides, I searched for an article about how to enable app for MS Teams meeting. It maybe useful for your scenario.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 35%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
Hi @@Sandor Tokodi , we are working on it, will let you know the update as soon as possible.
Hi @Sandor Tokodi , Could you please share the document that you are following and we are unable to view the error image, could you please re-share the error image.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 2%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESN%3C/text%3E%3C/svg%3E)
Hi,
The small button in the red frame and the three dots are not visible in the sidepanel.
This feature is only in private preview and our app was not allowed. After allow it works well. But it was not mentioned in the documentation only that it is in dev preview.
Hi @@Sandor Tokodi , We have tested from our end by adding stage in meetingSurfaces you can able to share tab content in a meeting . please refer he below code.
"meetingSurfaces": [
"sidePanel",
"stage"
],