1. Log on to the Trend Micro Email Security console, go to AdministrationOther SettingsEmail Reporting Add-in for Outlook, and copy the Link to manifest file.
  2. Log on to the Microsoft 365 admin center with your Global Administrator account.
  3. Go to SettingsIntegrated apps.
  4. Locate and click Report Email.
  5. On the Report Email screen, click Update app under Actions.
  6. On the Update file screen, click Provide link to manifest file, paste the link you copied in step 1, and click Validate.
  7. Wait until the validation is completed and click Next.
  8. Click Accept and update and click Done.
    According to Microsoft, it can take up to 72 hours for the update of an add-in to apply at your users' side.