Here's the funny thing; we are hosting two companies on that problematic server, both cca 40 employees. Most have Outlook (2003 or 2007)
On another server, set up just a week before, we are hosting another company, cca 120 employees, with about 40 Outlook connectors.
That one has virtually no problems whatsoever. And it is 6.0.3. Problematic one is 6.0.4.
However, guys that have no problems are all in one place, with 20 MB link.
Problematic companies have employees scattered around in several countries. From what I can see, I think that some of them have subpar connections.
Some questions about the bug you've posted...I don't think that we are experiencing CPU spikes mentioned there, but we do get those file upload errors.
Please, can you ask someone what's the difference between one ending with "null", and one ending with "timeout"?
"null" we get if EOF, if connection breaks during upload? And "timeout" if more than 60 seconds passes?