Yesterday I changed all the folders with grave accents to underscores. In Outlook for Windows I renamed 'Apple to _Apple and the other folders with grave accents the same way.
I deleted my Exchange account in Mac Mail and resynched. All the folders showed up. This evening I wanted to move something to a folder and all the folders with underscores in front of them (about 6) were gone.
The folders are there and work on my iOS devices but not on Mac Mail. Seems like a bug or an undocumented feature.
Not yet. Today when I got back in all I had was a top folder "Exchange" and NO subfolders. I closed Mail and reopened and same thing. I did it again and left it for a while and lo and behold, the fodlers are back again.
I don't know if there's anything to "figure out" as it seems like a bug with Lion Mail. I've recreated the Exchange account 4 or 5 times and still the same behavior.
Are you using Exchange too? Do you have any folders with non alphanumeric characterss in the names?
Fully quit Mail application.
Hold down "option" and select "Go" from the top toolbar.
In the Library folder, go into the Mail folder.
In the Mail folder locate a file called Envelope Index. Drag that file to your desktop.
Reopen the Mail application, it should reimport your mail messages/folders.
There's this from another discussion. My folders have been OK today so I'm not going to try it until they get bad again. If anyone tries this while folders are missing and they come back, let us know.
1. In Finder, open your Utilities folder and double-click Keychain Access
2. Once Keychain Access loads, in the menubar, click "Keychain Access" -> "Preferences"
3. In the Preferences window, click "Certificates"
4. Change the dropdown for "Online Certificate Status Protocol (OCSP):" to "Off"
5. Change the dropdown for "Certificate Revocation List (CRL):" to "Off"
6. Close the Preferences window
7. Quit Keychain Access
8. And you're done!
Did you see this in another discussion? Below the line is what someone else said, not what I'm saying I did.
This didn't help me! I had probs with iCal and the Adress Book. Mail ran perfect. I didn't get an error message, it seemed to correctly log in but there was no data and syncing.
I reinstalled the ssl-certificate in the Keychain Access (just doubleclicked it) and after that everything worked perfectly.
Somehow iCal and Adress Book seem not to correctly install ssl-certificates.
I'm having the same problem. Verry irritating becease i use this for my business daily. Will not use Entourage even as Sparrow will not allow Exchange mail.
Using up to 3 Exchange accounts in Mail and all have that same problem; folders seems to dissapear. When i log in online at exchange mail, i see all my folders back.
Non of the suggested sollutions in this treath worked for me... Dissapointed in Apple for the first time, frustrated working with Apple for the first time. I hope there will be an update verry soon... Is Apple reading this?