Error: Outlook 2011 keeps downloading e-mails & never completes


Last year we migrated our environment from Lotus Notes to Exchange 2010.

As such, we’re using Outlook 2011 on our Mac clients.

Some users accounts would just keep downloading.. after much head scratching & hair tearing we found the issue.

The issue

It appears that within the folders that were constantly trying to download contained e-mails with BinHex attachments, as per the linked document this would be the attachment format that a Mac Lotus client would in some situations send out.

The solution

To resolve,

  1. Login to OWA as the affected user.
  2. Search across the whole mailbox for .hqx
  3. Download all the attachments if wanted.
  4. Delete the offending e-mails.
  5. Log out of OWA.
  6. Open Outlook 2011 & sync.

Others have verified the issue with me. Strangely when using OWA, Outlook on a PC over MAPI, Outlook on a PC HTTP over RPC or Mail using EWS this problem does not exist.

3 thoughts on “Error: Outlook 2011 keeps downloading e-mails & never completes

  1. NTB

    I have had the same problem with a few of our clients. I hadn’t known about this possible fix, so I’ll definitely have a look next time it comes up.
    I have managed to temporarily get around the problem by bypassing our internet filter. Strangely enough (and annoyingly!), when it was going through the filter there were no logs indicating any problems, but the client just kept “downloading”. Definitely something I’ll be chasing up when I see it again!

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