Install Rulebook
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1
Copy the install link
manifest.xml -
2
Paste it into Integrated apps
Microsoft 365 admin center → Settings → Integrated apps → Upload custom apps → Office Add-in → provide a URL → Validate.
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3
Assign it to yourself and approve
Under Add users, choose Just me, then accept the permissions it asks for. Needs Global Administrator access.
Rolling this out to more than yourself? Choose Specific users/groups or Entire organization in step 3 instead of Just me.
Already installed? Open management, or look for Rulebook on an open message in Outlook.