Using OWA 2007 for mailbox access via internet. There is ISA 2006 between client and CA The problem is when some user tries to send email, the process hangs for about 1min with "loading..." window, then terminates with error "exchange server timeout". Sometimes, after a number of retries, the email is sending OK.
The interesting fact is that when using Mozilla Firefox as client, the first sending process hangs about 2 times longer, but it eventually sends OK,and after that every following emails sends fine.
When using OWA inside, there are no problems at all.
Symptom 1 On a computer that is running Microsoft Windows Vista, you cannot perform any editing tasks that you typically expect to perform. For example, you cannot perform the following tasks: Compose a new e-mail message Reply to an e-mail message Create a new contact, task, note, journal entry, or appointment Change any configuration in the Outlook Web Access options folder