Errors deleting email: Unknown error and very slow deleting messag

[Keith Rainey]

I am running Exchange 2010 with a mixture of Outlook 2003 & 2007 clients.
When deleting messages some users receive "unknown error", others take a long
time for the message to disappear from the folder list (sometimes up to a
minute).


Any ideas how to fix this? I have a lot of perturbed users over this thing.

Thanks!