d740b30b_Known_Issues___Computer_Help__Issues
[Workaround] There is no work around or solution to this issue. Unless you setup a alternate computer to send the IMAP or POP account. [Issues] 
On Outlook 2010 With Zimbra Connector for Outlook (ZCO) 7.x.x and having a second account setup as POP or IMAP. After setting up the POP/IMAP as the default account to sent emails from. When i do a mail merge from Word the emails are getting sent from the Zimbra account and not the default account.
Known Issues | Computer Help
Issues