[German]Currently, reports are piling up that an update of Outlook (C2R version) may have caused a bug. The mail program suddenly displays only the first lines of emails. Here is a summary of what has come to my attention. Addendum: Microsoft has released a Fix.
First user message in the blog
The problem first came to my attention a few hours ago through this comment by German blog reader Matthias Kammerlohr. Matthias wrote (I've translated the text):
Have had no problems upgrading Exchange 2013, 2016 and 2019 – however, since just now we have had the problem that Outlook (after a restart) can no longer display emails and this is not the case for either on-prem or cloud customers.
Can anyone confirm this?
The problem was then confirmed by Josef Hlawaty and J K in follow-up comments:
Josef Hlawat: Yes, have the same problem here with an Exchange 2016 CU20. You only see the first line of each mail (e.g. "Hello!"). Scrollbars for the rest are there, but nothing is displayed….
J K: Upgrade from Exchange 2013 Cu23 went without any problems.
However, I also have the problem that Outlook can no longer display the emails correctly.
In OWA everything is displayed normally.
So it was not an isolated case – and then the messages came in on other channels as well.
More reports via Facebook and Twitter
On Twitter Benjamin reported with the following tweet:
Then there was a private message on Facebook from Meinolf W., who asked if I had heard anything about a problem that prevents Outlook from displaying mails. Quote: "hm now all my mail accounts are blank even the ms365". Meinolf referred to this German forum discussion at Computer Base, which started on May 10, 2021.
Outlook shows only the first/first lines of an email
I have been using the same Outlook on the computer here for years without any problems and since today only the first or first lines of emails are shown to me (see screenshot) and nothing else. Restarting Outlook and the PC have brought nothing What can this be?
(Source: ComputerBase, Click to zoom)
It seems to affect Click-2-Run versions of Microsoft Outlook, which must have been updated recently. The ComputerBase thread confirms the bug and there are now already three pages on the topic. According to those affected, the problem occurs with Microsoft Outlook 2016/2019 and for Microsoft 365 whereby different versions (version version 16.0.13929.20360 Build 2104 (13929.20296 but also 13929.20372) are mentioned. In tensforum here is also a comment on the topic New Microsoft 365 Current Channel v2104 build 13929.20372 – May 11 with the following comment:
After this update my Outlook no longer displays the body of my e-mails. I only see the subject line and for a brief moment the first line of the e-mail before it disappears. I can't find the feedback option and when I tried live chat I started in the line number 208. Probably faster to go with another e-mail program.
The remedy is to downgrade to the previous version by opening an administrative command prompt and then running the following command:
"C:\Program Files\Common Files\microsoft shared\ClickToRun\officec2rclient.exe" /update user updatetoversion=16.0.13901.20462
Then restart Outlook – has helped those affected.
Addendum: Autofix by Microsoft
Microsoft has probably released a fix for the display error in mails during the night. In the Microsoft 365 Admin Center there is an entry EX255650: Issue affecting viewing email content in Outlook with the following information.
Title: Issue affecting viewing email content in Outlook
User Impact: Users may be unable to view email message content within Outlook.
More info: Impact is specific to the Outlook client and users with access to other protocols, such as Outlook on the web or the Outlook mobile app, can view message content in those platforms as a potential workaround while our fix is applied.
Current status: We've identified the underlying cause of impact and are applying a fix. This fix will reach all affected users incrementally over the course of the next four-to-five hours. Once users receive the fix, they will need to restart their email client to apply the fix. In some circumstances, users may need to restart their client a second time for the changes to take effect. We expect to complete this process and restore service for all affected users by May 12, 2021, at 3:00 AM UTC.
We encourage affected users who are able to do so to leverage the workarounds described above in the „more info" section of this post while we complete the process of fixing this problem.
Scope of impact: This issue could affect any user attempting to view an email message in the Outlook client.
Root cause: A recent change to systems that facilitate text display management for content within the Outlook client caused impact.
By now, a fix should have been rolled out for the affected systems, which will be installed via auto-update. But comments from my German readers say, that the fix doesn't help – there are white text on white background, so marking the mail body shows the text. Also launching Outlook in safe mode (see this article from Bleeping Computer) will show the mail.
I can't test anything, because I decided in 2009 to go without this quality software from redmond.
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