Hi! I understand you have a new user added to a Missive shared inbox, but not all emails are showing up for that user—just a few random ones. To help out, can I ask a couple quick questions first?

1. Has this new user been added properly with access to the shared inbox from your Missive account settings?
2. Did you follow the typical steps for adding a shared inbox account to their Missive? (For example, adding the account in Accounts settings, and selecting "Yes, this is a shared account" as well as "Team Inbox" or "Inbox")1
3. Are other users in the same shared inbox seeing all emails correctly?
4. Is this issue only happening in Missive’s app on this Windows 10 WebKit browser or across other devices/apps as well?

Meanwhile, here’s a checklist to troubleshoot step-by-step:

1. Verify the User’s Account Access
- Make sure the user’s account setup includes the shared inbox and that mailbox permissions are correctly granted. Sometimes partial access can cause intermittent email visibility.

2. Reload Mailbox/Sync
- Ask the user to manually refresh the inbox in Missive to trigger synchronization with the shared mailbox.

3. Check Filter/Rules
- Confirm that there are no filters or rules applied in Missive that might be hiding or auto-archiving certain emails for that user.

4. Review Missive’s Mailbox Settings
- Open Missive settings for that user: under Accounts > Mailboxes tab, ensure the shared mailbox is selected for the correct mailbox types8.

5. Re-add Shared Inbox
- Remove and re-add the shared inbox for that user in Missive. This can often fix sync issues by resetting the mailbox view.

6. Permission Check on Email Server
- Verify with your email admin that sharing permissions for the mailbox are properly configured. Sometimes server-side permissions cause missing emails on some clients/users6.

If you have already tried some of these steps, just let me know which ones, and we can dive deeper.

Does this sound like a good place to start? I’m here to help you get those emails loading properly!