I upgraded from current Yosemite to the El Capitan GM Candidate this morning. For work, I have an Exchange account with a bunch of folders in Apple Mail. Upon starting Mail after the upgrade, my folders were no longer present; Mail synced a few thousand messages, but it does not show the folders that are on the server.

I dug through the Exchange account preferences and the Mail preferences, but I haven't been able to find anything. Does anyone have a suggestion?

  • As I found on apple.stackexchange.com/questions/70174/… - I expect that using Mailbox > Rebuild might be able to help. – Gijs Sep 10 '15 at 11:39
  • Ah, looks like that may have helped. Or at least, after Mailbox > Rebuild, I still had to restart Mail to actually see my folders (and it's possible that a Mail restart without Rebuild would have fixed it, I guess?). – djc Sep 10 '15 at 11:43
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    Please report this experience to Apple using the Feedback Assistant – assuming it is in the GM Candidate; every report helps! – Graham Miln Sep 10 '15 at 12:25

I fixed this by entering the passwords into Mail > Preferences > Accounts instead of Mail > Accounts (Internet Accounts in System Preferences) and it saved the passwords without any issues.


I had the same issue. Have deleted my full account in mail, then added again the same account (after checking on webmail that all folders are still there) and it took a while to get all emails back but it seemed to work. Everything is back again, including the original folder structure. Does anyone know how I can trace these emails in Finder? Can't find them and would like to back-up these

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