Microsoft fixes Outlook email sending issue for users with many folders

​Microsoft has fixed a known issue affecting Outlook for Microsoft 365 users that caused problems sending emails for those with too many nested folders. In August, Microsoft also shared temporary workarounds for known issues triggering Gmail sign-in issues for classic Outlook users and causing Outlook to crash after opening. In the meantime, until the affected users' software is fixed, Microsoft provides a temporary workaround requiring them to reduce the number of folders with subfolders to below 500, aiming for 450 nested folders. Microsoft says users trying to send emails from the Outlook desktop app may receive an unexpected Non-Delivery Report (NDR) with the 0x80040305 error code. Earlier this month, the company also addressed a bug causing Microsoft 365 apps like Outlook, Word, Excel, and OneNote to crash while typing or spell-checking a text. Another temporary solution to these Outlook email-sending problems is to keep all mailbox folders collapsed rather than expanded. When it first acknowledged the email-sending issues in December, the company linked them to an older problem related to mailboxes with more than 500 shared folders—a limit removed in 2019. "This issue is like the prior 500 folder limit that the Outlook Team fixed, Lifting the 500 Folder Limit in Outlook," the company said.

This Cyber News was published on www.bleepingcomputer.com. Publication date: Tue, 01 Oct 2024 20:25:25 +0000


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