Hello JDF Flooring, thanks for sharing your issue with the community.
To resolve the repeated sign-in pop-up and the SSPR_0011 error you're encountering in Microsoft Office, the best course of action is to contact your organization's IT support team or system administrator. This error is related to your organization's Microsoft Entra ID configuration, specifically the Self-Service Password Reset settings. Only someone with administrative access to your organization's Microsoft 365 or Entra tenant can enable and configure the password reset policy needed to stop these prompts.
Hope this helps clarify the situation.
Kind regards,
John Oli