Microsoft has acknowledged a brand new difficulty affecting Outlook for Microsoft 365 customers and inflicting email-sending issues for these with too many nested folders.
Based on Redmond, that is probably associated to an older difficulty regarding mailboxes with greater than 500 shared folders, a restrict lifted in 2019.
Nonetheless, plainly Microsoft failed to contemplate instances when customers would even have that many folders of their main mailbox.
“When utilizing Outlook Desktop to ship an e mail, you get an sudden Non-Supply Report (NDR) that features the error code 0x80040305,” the corporate stated in an advisory printed on Friday.
“This difficulty is just like the prior 500 folder restrict that the Outlook Workforce mounted, Lifting the five hundred Folder Restrict in Outlook. That answer focused shared folders however didn’t embrace the state of affairs occurring within the consumer’s main mailbox.”
Affected customers are additionally instructed that their emails didn’t attain “some or all” recipients and are suggested to ship the message once more later or attain out to their community admin.
Workarounds obtainable
Whereas Microsoft is at the moment investigating this newly acknowledged difficulty, it additionally offered affected clients with some tricks to workaround the e-mail sending issues.
The corporate’s suggestions embrace decreasing the variety of folders which have subfolders to below 500, with at most 450 nested folders throughout this difficulty’s ongoing investigation. One other non permanent repair can be to maintain all mailbox folders collapsed as an alternative of expanded.
“If you cannot do both of the above, keep away from subsequent on-line actions in Outlook. Such actions embrace utilizing the buttons for ‘View on Server’ and ‘Click on right here to view extra on Microsoft Alternate,’ or use of ‘Embody older outcomes’ when looking out,” Microsoft stated.
“Should you use any of those actions, restart Outlook instantly for finest efficiency.”
This week, Microsoft additionally mounted a bug inflicting Outlook Desktop purchasers to crash when sending emails from Outlook.com accounts.
Redmond additionally issued fixes for some customers impacted by a Microsoft 365 difficulty resulting in ‘One thing Went Fallacious [1001]’ sign-in errors, blocking many affected clients from utilizing desktop Workplace apps.
Beforehand, they addressed one other Microsoft 365 difficulty inflicting notable delays whereas saving attachments in Outlook Desktop to a community share.
This 12 months, it additionally tackled a number of different Outlook-related points, together with bugs stopping Microsoft 365 clients from accessing emails and calendars and sluggish begins and freezes throughout cache re-priming.
