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Power Automate - Building Flows
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Granting Access to Guest Users

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Hello, 
 
I know there are many like this out there, but none of them solve my issue.
 
I am attempting to grant access to guest user to a SharePoint site (Visitor Permissions) using PowerAutomate. For the last two years I have manually granted access to guest users to the SharePoint site and was hoping to automate the process. 
I have a form where I collect a person's email and the info gets stored into SharePoint list. Using PowerAutomate, how do I give access to the email that I have collected. 
 
I've have tried HTTP request, which half worked. It works for emails that have been granted access to the site before. For tests, I deleted and re-added using the form. However, for some reason, when I tried adding a brand-new email, it doesn't work. I receive the following error: 
 
 
This is what I have have:
 
Any help is appreciated.
 
Thank you, 
 
 
  • Suggested answer
    Michael E. Gernaey Profile Picture
    43,442 Super User 2025 Season 1 on at
    Granting Access to Guest Users
    Hi
     
    My suggestion
     
    1) create a Guest O365 Security Group
    2) add it to sharePOint
    3) use the 0365 add user to group and bingo they have instant access
     
    Its the best policy instead of adding individual users all the time.
     

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