Dear Medha Bhatt,
Thank you for posting your query in our community.
Your question is User keeps showing in User Info List of SharePoint Online even though deleted through PowerShell.
Follow the steps below to check if it will help you.
- Please go to SharePoint admin center
- From the articlehttps://learn.microsoft.com/en-us/sharepoint/remove-users copy the following URL /_layouts/15/people.aspx?MembershipGroupId=0
- Please add (/_layouts/15/people.aspx?MembershipGroupId=0) to end of your SharePoint URL.
Example:
- Select your non-existent users on the site, , click on actions, delete users from site collection.
If the above solution doesn’t work for you, we recommend you to Contact our Microsoft Support for further testing it's best to reach out to our Microsoft Support for further assistance.
https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide
When you are contacting support, provide detailed information about the issues you're facing, including the steps you've taken, any error messages received, and the browsers and devices used. This will help them investigate the issue more effectively and provide you with specific guidance. The engineers in the related team have higher permission than us to help check it from background.
Have a good day!
Best regards,