Error #1609 indicates an issue with a team shared folder. This is usually caused by an invalid invite link or code, an account mismatch during signup, or a shared folder that needs to be recreated by the share administrator.
You may see one of these messages:
1609 – Shared folder is corrupt. The Share Admin needs to recreate the shared folder.
1609 – Share invite link is not valid. Ensure you’re clicking the link in the invite email directly, or double-check the verification code.
1609 – The Share Admin needs to remove and re-add you because your Sync account was created outside the invite process.
1609 – Unknown issue.
How to fix this:
1. Confirm that the latest invite is being accepted
Before making any changes, make sure the user is accepting the most recent invitation.
Open the most recent shared folder invitation email (older invites will no longer work).
Click the invitation link directly from the email (avoid copying/pasting the link if possible).
If you’re entering a verification code, re-enter it carefully (watch for extra spaces or missing characters).
If the invite still won’t accept, continue below.
2. Remove and re-invite the user
If the invite is valid but still fails, the Share Admin needs to resend the invitation.
Share administrator steps:
Remove the user from the shared folder.
Re-add the user to the shared folder by sending a new invitation.
Invited user steps:
Have the user accept the shared folder invitation.
Once the user accepts the new invite, they will regain access. If the error continues after a new invitation, move to the next section.
3. Unshare the folder and recreate the share
If removing and re-inviting doesn’t resolve Error 1609, the shared folder may need to be recreated. In this case, the Share Admin must unshare the folder for everyone and re-share it.
Share administrator steps:
Unshare the Team Shared Folder with everyone all at once.
Re-share the folder and invite your friend and any previous shared folder members
Invited user steps:
Have the user accept the new shared folder invitation in the most recent email.
Still having trouble? Contact support.
If the issue persists after following these steps, please contact our support team with details about what took place when the error occurred so this can be investigated further.