Message context menu
The message context menu contains a Search in MM action which searches by message text. The Message context menu may be opened using the context menu.
Results will be posted to the conversation.
Information note
If the context menu doesn’t have the option Search in MM then it is hidden under the context sub-menu More options. Teams remembers the latest used context menu actions, so next time it will be shown in the “main context menu” not the sub-menu.