Hello all, I am posting this discussion because i am amazed at the fact that I cannot find an email client that is able to appropriately handle calendar invitations to/from myself for multiple email addresses and associated calendars. With Outlook, my issue is that Outlook views my Exchange account as the default calendar account, so that when I accept an appointment to any other non-Exchange account (eg IMAP), the person who sent the invitation gets an 'accept' email from my exchange email address, and not from the email address to which he/she sent the invitation. This looks very unprofessional. Thunderbird works better and allows for calendars to be matched to email addresses, but has a bug with accepting calendar invites that still has not been resolved: https://bugs.horde.org/ticket/13664 Is anyone aware of an email client for Windows that is able to appropriately handle multiple email accounts (exchange, imap, etc) and associated calendars (exchange, caldav, etc)? Rik