Viewing another person's calendar over the Web is only available when using the IE browser.Check whether the recipient's address reported in the error message is correct, if not, resend the message to the correct address. Due to the e-mail transition to Exchange, the server-based global address book which is cached (stored) in a user's e-mail program may reflect an old address until updated from the server.For more, see: Users may experience issues receiving instant messages while using the integrated Lync functionality within Exchange Outlook Web App.To avoid this issue, use a full version of the Lync client.When receiving attachments Virus Scan 7.x may place a Heuristic virus warning before the body of a message.Upgrade to the latest Virus Scan software to resolve the issue.(the default setting), Avast Antivirus will delete all the text in the body when the option to scan outbound messages is enabled in Avast's Mail Shield settings.To avoid this problem, either disable the Exchange 2010 has changed the way distribution lists are managed.
Windows will send a signal to Outlook telling it to shut down automatically when all internal processes are complete.
At this time, there is no workaround in Chrome; use Internet Explorer or Firefox to access those functions in OWA.
Alternatively, you can use Outlook or an IMAP mail program.
Other issues may also arise if using Outlook 2003 in an Exchange 2010 environment. This most often manifests as an inability to add an attachment or look up someone in the Address Book. Google Chrome discontinued support for modal window use.
To connect to an Exchange 2010 mailbox using Outlook 2003, you must enable encryption.