Thunderbird Community Forum

In our organization we have moved from an on-premise mail server to M365. We've also added our new EWS-based accounts to Thunderbird. Since there are a large number of users with a significant amount of older mails they want to have access to, they have been asking how they could upload them to EWS now.

From the looks of it, using TB one can either drag and drop messages from the local folders to EWS. Would message copy/move from the local folders be faster if the EWS account was setup over IMAP, instead of over EWS? If so, we could setup another account corresponding to the same EWS identity, but over IMAP, just for the purposes of transferring messages faster.

Thanks in advance for any information provided.

In our organization we have moved from an on-premise mail server to M365. We've also added our new EWS-based accounts to Thunderbird. Since there are a large number of users with a significant amount of older mails they want to have access to, they have been asking how they could upload them to EWS now.

We've noticed that either copying or moving messages from local folders to an EWS folder fails after some time. Has anyone encountered this?

From the TB diagnostics console:

08:32:44.651 Warning: Invalid absolute docBaseUrl: "x-moz-ews://outlook.office365.com/%CE%95%CE%B9%CF%83%CE%B5%CF%81%CF%87%CF%8C%CE%BC%CE%B5%CE%BD%CE%B1/6163?part=1.2&filename=%CE%94%CE%95%CE%9B%CE%A4%CE%99%CE%9F%20%CE%97%CE%9C%CE%95%CE%A1%CE%97%CE%A3%CE%99%CE%91%CE%A3%20%CE%91%CE%A0%CE%91%CE%A3%CE%A7%CE%9F%CE%9B%CE%97%CE%A3%CE%97%CE%A3%2004-%CE%9C%CE%91%CE%A1-2026.pdf&type=application/pdf". 2 pdf.worker.mjs:357:13 08:32:44.663 PDF 5df956e1527bf80c20efa2f3af9d8129 [1.7 Microsoft: Print To PDF / -] (PDF.js: 5.4.445 [ec5330f78]) 2 viewer.mjs:15734:13 08:42:07.645 TypeError: can't access property "ownerGlobal", navigatedWindow.windowRoot is null FormHandlerChild.sys.mjs:413:31

   notifyProcessRootOfNavigation resource://gre/actors/FormHandlerChild.sys.mjs:413
   onLocationChange resource://gre/actors/FormHandlerChild.sys.mjs:361
   #pushOrReplaceState resource://pdf.js/web/viewer.mjs:6460
   #tryPushCurrentPosition resource://pdf.js/web/viewer.mjs:6479
   #pageHide resource://pdf.js/web/viewer.mjs:6632
   closeTab chrome://messenger/content/tabmail.js:1128
   removeTabByNode chrome://messenger/content/tabmail.js:1146
   connectedCallback chrome://messenger/content/tabmail-tab.js:99

08:42:33.829 NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIMsgFolder.firstNewMessage]

   onMessagesLoaded chrome://messenger/content/mailCommon.js:1198
   set searching resource:///modules/DBViewWrapper.sys.mjs:999
   onSearchDone resource:///modules/SearchSpec.sys.mjs:528

mailCommon.js:1206:19

   onMessagesLoaded chrome://messenger/content/mailCommon.js:1206
   set searching resource:///modules/DBViewWrapper.sys.mjs:999
   onSearchDone resource:///modules/SearchSpec.sys.mjs:528

All our systems are Windows 11 Pro rigs, domain-joined, with ESET endpoint security installed.