Option 1: Employee enters their own birthday
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Click on your picture in SharePoint and select My Microsoft 365 profile
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Click Update your profile
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Click About
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Set your birthday and click Save changes
Option 2: SharePoint administrator enters birthdays manually
- Go to SharePoint Admin Center and log in as an administrator.
- In the left-hand menu, go to More Features → User Profiles.
- Click Manage User Profiles.
- Search for the user whose birthday you want to update.
- Click on their profile and edit properties.
- Look for the “Birthday” field (or similar property).
- Update the date and save the changes.
Option 3: SharePoint administrator uses PowerShell to update birthdays
(script not readily available)