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Power Platform Community / Forums / Power Automate / Office 365 outlook sta...
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Office 365 outlook status 404 - 3rd party user

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Posted on by egornua1 364
Hi All,
 
I have a flow using the O365 outlook connector and one of the 3rd party users is getting a 404 error
 
when the user clicks ellipses, they only get a switch account option
 
can anyone advise or suggest another option?
 
Microsoft documentation - This error can occur if the mailbox is on a dedicated Microsoft Exchange Server and is not a valid Microsoft 365 mailbox.
 
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  • Suggested answer
    Michael E. Gernaey Profile Picture
    Michael E. Gernaey 53,493 Super User 2025 Season 2 on at
    HI
     
    Thats too small to read.
     
    But I am assuming that this 3rd party person has never worked, and the connection itself is NOT shared with them.
     
    Are they are guest in your AD?
    Did you assign them a License? (for O365, and Power Apps) etc?
     
    Its one of those. Make sure they are able to use Shared Connections.
     
    Cheers,

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