On a Mac, you may see the spinning pin wheel appear for up to 30 seconds every time Thunderbird syncs email with Office 365. Try changing your email sync schedule to 10-15 minutes as a work-around solution. If you update Thunderbird, update the Exquilla add-on through Thunderbird to the latest stable release.

First off, I do not have ccleaner installed, so PLEASE do not say that is the issue.I have been using Thunderbird on a Mac for at least a decade, possibly 2 decades - I'm too old to remember how long. I have been stymied by this issue for months and cannot figure out where this setting is stored. I have tried deleting session.json, but that does not work. Any help would be appreciated. Coincidentally, when running 68.xx, none of my session info is saved on closing Thunderbird, e.g., my last opened folder, etc - but IS saved when running 60.9.1 Am I missing some preferences from my years of upgrading version after version?

Do I really just need to make a clean install? SFHowes,This did NOT fix my problem. Ni usb 6218 driver for mac windows 7. However, it let me track it down.

I run one extension, Exquilla to attach to an Exchange server. When disabling this extension, things appear to be working fine in Thunderbird, but sadly, I cannot see my Exchange mailbox.I have started to look into this with. I thought I might possibly change to Owl for Exchange support, but it appears that the Message Pane issue is ALSO happening with Owl. I will contact Beonex and see if they can assist. Thanks for YOUR assistance, it stopped me from hitting my head on the wall, which is what I had been doing and my forehead is starting to feel normal again.I guess this thread can be closed/archived.

The problem isn't solved, but it's not a Thunderbird issue either.👍 0. SFHowes,This did NOT fix my problem. However, it let me track it down. I run one extension, Exquilla to attach to an Exchange server. When disabling this extension, things appear to be working fine in Thunderbird, but sadly, I cannot see my Exchange mailbox.I have started to look into this with. I thought I might possibly change to Owl for Exchange support, but it appears that the Message Pane issue is ALSO happening with Owl.

I will contact Beonex and see if they can assist. Thanks for YOUR assistance, it stopped me from hitting my head on the wall, which is what I had been doing and my forehead is starting to feel normal again.I guess this thread can be closed/archived.

The problem isn't solved, but it's not a Thunderbird issue either. SFHowes,This did NOT fix my problem.

However, it let me track it down. I run one extension, Exquilla to attach to an Exchange server. When disabling this extension, things appear to be working fine in Thunderbird, but sadly, I cannot see my Exchange mailbox.I have started to look into this with Beonex.com. I thought I might possibly change to Owl for Exchange support, but it appears that the Message Pane issue is ALSO happening with Owl. I will contact Beonex and see if they can assist. Thanks for YOUR assistance, it stopped me from hitting my head on the wall, which is what I had been doing and my forehead is starting to feel normal again.I guess this thread can be closed/archived.

The problem isn't solved, but it's not a Thunderbird issue either.