Microsoft is rolling out fixes for identified Microsoft 365 problems inflicting ‘One thing Went Fallacious [1001]’ sign-in mistakes and rendering desktop packages unusable for plenty of shoppers.
As the corporate stated nearly one month in the past, those login problems have an effect on shoppers the usage of Excel, Phrase, Outlook, and PowerPoint for Microsoft 365, Microsoft 365 Apps for industry, and Workplace apps for iOS and Android.
“When customers try to signal into Microsoft 365 desktop packages, they obtain an error message. Error: One thing went fallacious. [1001],” Microsoft defined.
Whilst the Microsoft 365 desktop app authentication mistakes had been connected to person profile control problems and to safety tool blocking off Internet Account Supervisor (WAM) plug-ins from operating, the corporate continues to be investigating the login issues and examining logs from affected customers to spot some other possible root reasons.
Microsoft advised affected shoppers to open M365 Admin Portal toughen tickets and connect Microsoft Workplace Authentication/Id Diagnostic (MSOAID) logs to hurry up the investigation.

Signal-in problems (form of) fastened, workarounds to be had
Redmond not too long ago launched new Workplace variations for Present Channel customers on November 14 to deal with one of the root reasons at the back of those ongoing login issues.
“Workplace Model 2310 launched to Present Channel, Model 2309 launched to MEC, comprises fixes for positive Workplace Signal-in failure eventualities,” Microsoft says.
“There may be nonetheless an opportunity for sign-in to fail for a special factor or state of affairs. Now not all problems will probably be fastened by way of one replace.”
You’ll to find additional information on model availability dates at the “Replace historical past for Microsoft 365 Apps (indexed by way of date)” toughen web page.
Customers experiencing problems opening Microsoft 365 apps are suggested to make use of the Outlook Internet App (OWA), Workplace internet apps, or cell packages as a workaround.
The next measures may also lend a hand do away with the sign-in mistakes:
- Rebooting the software steadily is helping to mitigate the problem.
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Run the instructions underneath in person mode PowerShell to fix Internet Account Supervisor (WAM) (further context in this text):
Upload-AppxPackage -Check in "$env:windirSystemAppsMicrosoft.AAD.BrokerPlugin_cw5n1h2txyewyAppxmanifest.xml" -DisableDevelopmentMode -ForceApplicationShutdown Upload-AppxPackage -Check in "$env:windirSystemAppsMicrosoft.Home windows.CloudExperienceHost_cw5n1h2txyewyAppxmanifest.xml" -DisableDevelopmentMode -ForceApplicationShutdown
The corporate additionally supplies additional steering on the way to repair Workplace app authentication problems and for many who can not check in to Microsoft 365 desktop apps.