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IMAP (and POP) accounts are not Exchange such. They will use the email addres in the very same account, not the Exchange Primary.
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Hey guys, &nbsp; I have users that have old IMAP account and when they reply or forward to an email in that account it defaults to the old email address. &nbsp; I have the users set to send by default from their exchange account. &nbsp; Any ideas?
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Hey guys,   I have users that have old IMAP account and when they reply or forward to an email in that account it defaults to the old email address.   I have the users set to send by default from their exchange account.   Any ideas?

Imap folders not defualting to exchange when replying from outllook

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.