Thunderbird not showing extant folders/not deleteing grey folders.

Running Thunderbird 52.8.0 (32 bit) with the mail supply from Office 365.

Two issues:

1. I have a series of Grey folders - almost all are empty. If I delete them they disappear then reappear???
2. I have created some new folders in Outlook that don't appear when viewed form Thunderbird.

I would prefer to use Thunderbird as my front end.
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Kyle SantosSoftware Test Analyst ICommented:

I am following up on your question.  Do you still need help?

If you solved the problem on your own, would you please post the solution here in case others have the same problem?


Kyle Santos
Customer Relations
edhastedAuthor Commented:
Sorry had computer issues and now back on line - yes the problem is still there. Another variant of this is that in some folders can't create sub-folders. Outlook works: Thunderbird doesn't.

Many thanks for your patience.
David FavorLinux/LXD/WordPress/Hosting SavantCommented:
Likely you're being hit with the "display only subscribed folder" problem... where...

Thunderbird is setup to only show subscribed folders... so when you create another folder in another client, these folders are by default marked as unsubscribed.

Normally under account settings, you'll find an option to toggle this option off, so you Thunderbird shows all folders... subscribed or unsubscribed.
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David FavorLinux/LXD/WordPress/Hosting SavantCommented:
Guideline: Using multiple clients with the same IMAP backing store (which it appears you're doing) is far more tricky than you might think.

If you're going to do this, likely best to use a hard core IMAP server which is multi-client aware + works with multiple clients.

Most IMAP servers fail mightily in this runtime situation.

Dovecot excels. Likely good for you to consider running Dovecot if you must connect to the same IMAP backing store... repeatedly... from many different clients...
Kyle SantosSoftware Test Analyst ICommented:

An expert has responded.  Is there anything else we may assist you with?
edhastedAuthor Commented:
This is coming off Office 365 as the store. The problem seems to be with Thunderbird and not Outlook. Outlook sees any changes, Thunderbird is being temperamental. If I uninstall Thunderbird and reinstall doesn't help (are there some residual settings which remain?).

Some computers work others don't. They are all on the latest version of Thunderbird.

Basically I need to shake Thunderbird but don't know how you technically achieve this.

Very many thanks for everyone's patience.
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