CmdID

CmdID / PowerShell / Cmdlets / Set

Set-TeamPicture

Update the team picture. Microsoft Teams PowerShell reference

From the Microsoft Teams PowerShell reference 2 parameters Its page in the reference

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Parameters

2 in the Microsoft Teams PowerShell reference
-GroupIdGroupId of the team
-ImagePathFile path and image ( .png, .gif, .jpg, or .jpeg)