I have a client running sbs 2003 with office 2010. Yesterday i had to modify their reverse dns as their old it support company were using a dns alias which is no longer in use. Im certain that this would have nothing to do with the issues they now have but i thought i would mention it.
Anyhow, today my client called me and mentioned that they are having issues sending and receiving emails. Outlook will just sit there with the egg timer "Outlook Is Requesting Data From The Server" Eventually the emails do arrive and they are able to send however the delays are causing big impacts on workflow and sometimes cause outlook to hang.
Its been working fine ever since yesterday but i cant see how the reverse dns change & deletion of the dns alias would have an effect.
I restarted all the exchange services as well as rebooting the server but it made no difference.