Search Entire Domain Group for Email Keyword

[Tom_Hammonds]

I need to search for a keyword in all emails from all senders of a particular domain. Not even sure where to begin.

[#2]

@Tom_Hammonds 

Hello! You've posted your question in the Tech Community Discussion space, which is intended for discussion around the Tech Community website itself, not product questions. I'm moving your question to the Outlook space - please post Outlook questions here in the future. 

[#3]

Good old Search-Mailbox or the eDiscovery/Content search functionality should get you started: https://docs.microsoft.com/en-us/microsoft-365/compliance/content-search?view=o365-worldwide