Hi Scott Green,
Thank you for posting your question in the Microsoft Q&A forum.
Do you mean you want to reset password for O365 user accounts?
If so, you can check this article to reset password from admin center or using Powershell. You also can use PowerShell to force the user to change the password after the next sign in:
Reset passwords - Microsoft 365 admin | Microsoft Learn
Manage Microsoft 365 users password - o365info
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