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Category Archives: Office
EX1464935: M365 Outage Due to Forgotten Certificate Renewal (August 31, 2026)
[English]A quick update and a question about whether anyone else is affected. A reader informed me that he has recently been receiving an increasing number of reports from customers about Microsoft 365 outages. Microsoft appears not to have renewed a … Continue reading
Posted in Cloud, issue, Office, Security
Tagged Cloud, Exchange Online, issue, Mail, Outlook
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Outlook: Missing images after the August 2026 patch day caused by GPO redirection
[German]Since the August 2026 updates were installed, several users have reported that something seems to have gone wrong with how images are displayed in Outlook Classic signatures. A red X now appears in place of the image. The collective wisdom … Continue reading
August 2026 Patch Day Recap (Office, Windows)
[German]On August 11, 2026, Microsoft released a batch of security updates for various Microsoft products (Office, Windows, etc.). It appears that no major disasters occurred after the security updates were installed. However, I've received reports from readers here on the … Continue reading
Microsoft 365: Semi-Annual Enterprise Channel (SAEC) is being discontinued
[German]A quick note for administrators of Microsoft 365 installations who have placed their users in the Semi-Annual Enterprise Channel (SAEC). This channel will be merged with the Monthly Enterprise Channel (MEC). Users will therefore be subjected to the flood of … Continue reading
Veeam Backup Issue with MS 365 Mailboxes due to the EWS retirement in March 2026
[German]A quick note to blog readers who use Veeam Backup 365. Back in November 2025, there were already issues with the integration between Veeam Backup and Microsoft 365 mailboxes. Now, a reader has once again reported the Veeam Backup issue … Continue reading
Why ISL Online: Critical factors when choosing a remote desktop solution
[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...
Outlook Classic: Email sending issue resolved
There was an issue sending emails in Outlook Classic when using a mailbox on outlook.com. This caused the operation to trigger an NDR error 0x80070005-0x0004dc-0x000524. The issue has since been resolved. I have added this information to the German post … Continue reading
Microsoft Outlook Classic: Workaround for crashes caused by the Teams Meeting add-in
[German]There is an issue with Outlook Classic where the client crashes on startup due to a faulty Microsoft Teams Meeting add-in. As far as I know, Microsoft is still investigating this problem. Below, I have compiled some workarounds for those … Continue reading
Microsoft Teams Meeting Add-in kills Microsoft Outlook Classic
[German]Microsoft is currently investigating a reported issue with Outlook Classic. There are user reports that using the Microsoft Teams Meeting add-in causes the Outlook Classic client to crash or become unusable.
Microsoft Outlook (2019, 2021, 365): Unable to connect to Exchange Online mailboxes
[German]A quick question for users and administrators who are still using Microsoft Outlook 2019 (support for Office 2019 expired in October 2025). I've received a report that it's currently no longer possible to connect to Exchange Online mailboxes. There have … Continue reading
Restructuring at Microsoft's Copilot division; forced Copilot app installation halted
[German]At Microsoft, the restructuring and reorganization of its AI division continues. Mustafa Suleyman is no longer directly responsible for the Copilot division. And Microsoft has apparently put a temporary halt to its attempt to roll out Copilot across all areas … Continue reading