Subscribe fails to .. subscribe
I'm using Thunderbird (128.10.0esr) with an Office 365 environment. Normally I'd be using Outlook, but I'm trying to get TB to work so that I can use some of the plugins to help clean the mailbox up.
We use MFA on O365 but, the setup and access itself seems to of gone fine. The mailbox does have a large number of folders (very large).
The main problems I'm hitting is that :
1) Not all of the folders are getting subscribed to. If I refresh the list, I can see all the folders.. I can even select them (though thats a painful process in TB, even with Shift-select). But once I've selected them - not all of them actually get subscribed. I seem to of now gotten to a point where maybe 50% of them are subscribed, the others are not even though I've tried selecting them several times.
There's no error coming out from TB that I can see.. Sometimes it'll sit there and say it's opening a folder.. Other times it seems to say its doing nothing at all (the activity monitor shows nothing).
2) Some folders are subscribed to that I definitely don't want, and I can't seem to unsubscribe them. Eg "Calendar". If I deselect that Folder, the status bar tells me it's unsubscribing but then nothing happens. The folder doesn't disappear either. Inside that folder there's 100s of "Retrieval using the IMAP4 protocol failed for the following message".. that repeats and grows on each get-new-messages.
I can imagine its some incompatibility between O365 and TB.. but where would I find a log of what it's failing on.. How do I get it to stop polling folders it shouldn't ? That seems to be issues on the TB side of things.
Searching the forums here I find lots of threads similar but not with answers, and surprisingly not too many about O365.
All Replies (4)
I should add: - Internet connectivity here is good, though I've tried from several wifi locations and with/without VPNs to rule out ISP interference. No difference at any location. - I do know there's some kind of limiting happening from the Exchange side as occasionally I'll see a message in Activity about rate-limiting. There's little I can do about the O365 side though (I'm not an admin).
Servers do not like VPN, so you would need to disable the VPN or use split tunneling and set up thunderbird to use it.
What Anti-Virus are you using?
If ESET:
ESET AntiVirus has been known to cause issues with downloading emails.
Temporarily Disable ESET SSL/TLS Filtering:
- Open ESET's main program window.
- Press the F5 key to access Advanced setup.
- Click "Protections" and then expand "SSL/TLS".
- Disable SSL/TLS filtering temporarily.
- Re-enable it after Thunderbird is working properly and restart your computer.
Exclude Thunderbird from SSL Filtering:
- Open ESET's main program window.
- Go to "Advanced setup".
- Expand "Web and Mail" and then "Web and E-mail Protections".
- Click "Exceptions".
- Add an exception for Thunderbird's executable file.
- Click "OK".
I've tried it on VPN and off of VPN - same outcome. O365 is cloud based so in theory should work fine in both environments here.
A/V is an interesting idea but it's a corporate A/V so I've no real control over it. I don't see TB complaining about anything though..
I've found how to turn on IMAP4 logging in TB.. it just seems to stop doing any activity without any complaint.
I'm finding if I stop/start TB occasionally it downloads more emails from existing folders that it obviously didn't before (too many for it to be new emails).
Deleted items also seems to be a bit of a problem for it. I've "emptied" it in Outlook.. left that for a while to make sure that synced - verified using the web interface there. But TB still thinks there's many folders under Deleted Items (though the folder itself seems in sync). Trying to empty that in TB results in.. nothing happening.
In case anyone knows: Any keywords to look for in the IMAP logs ? The usual "error".. "fail" aren't revealing anything.
You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.