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You may encounter the error “create PowerShell session is failed using OAuth” when trying to connect to Exchange Online or Microsoft 365 with PowerShell remoting. This failing OAuth authentication prevents PowerShell sessions from being created successfully.
In this comprehensive guide, we’ll cover common causes for this error, troubleshooting steps, and solutions to fix the PowerShell OAuth failure.
Understanding the Create Session Failure
The “create PowerShell session is failed” error appears when authenticating with OAuth to establish a remote session.
Key characteristics of this issue:
Occurs when running Connect-ExchangeOnline or Connect-MsolService
Prevents PowerShell modules like ExchangeOnlineManagement from loading
Specifies that OAuth authorization failed
Access token cannot be retrieved to start session
Typically occurs due to expired tokens, permissions problems, or authentication conflicts
Understanding the OAuth flow and possible points of failure will assist troubleshooting efforts.
Troubleshooting OAuth Authentication Issues
Here are the main steps to diagnose what is causing the PowerShell OAuth failure:
Ensure Latest Module Versions
Update the ExchangeOnlineManagement and MSOnline modules to their latest versions:
Automated tests and following Microsoft OAuth best practices can reduce future occurrences of the error and difficulties establishing remote PowerShell sessions for Exchange Online or Microsoft 365 administration.
Helpful resources for troubleshooting PowerShell OAuth authentication issues:
Using the structured troubleshooting approach outlined here along with Microsoft’s supporting documentation will allow you to diagnose and permanently resolve PowerShell OAuth authentication failures. This will enable establishing stable remote PowerShell connections.
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