ISSUE: Unexpected authentication failure when using O365 admin account

Last modified: 2 years ago

Overview

When EV Complete running command that require O365 Admin account you may see following error in the EV Complete Exchange log file:

2023-03-24T09:33:15|WARN |192.168.21.254|T:103|PsBaseWrapper             | ||0    |66ae3a2c-b9aa-430e-9997-b4eeb43fb390| ||Failed to establish the connection to MSOnline Powershell.Error msg: Authentication Error: Unexpected authentication failure.
2023-03-24T09:33:15|ERROR|192.168.21.254|T:103|PsBaseWrapper             | ||0    |66ae3a2c-b9aa-430e-9997-b4eeb43fb390| ||Initialization failed for cloudficient.cloud@contonso.com|MSOnline
EXCEPTION: System.Exception: Failed to establish the connection to MSOnline Powershell. Error msg: Authentication Error: Unexpected authentication failure.
   at cloudficient.Common.Powershell.PsBaseWrapper.InitMSOnlinePowershellSession(RunspacePool runspacePool)
   at cloudficient.Common.Powershell.PsBaseWrapper.InitSession(SessionPoolType type, Sessions sessionPool)
   at cloudficient.Common.Powershell.PsBaseWrapper.InitSessionPool(SessionPoolType type)

Solution

This error is caused by wrong credentials (account or Password) being store in the credential editor. Update the credentials for O365 admin account and restart Remad.Exchange service.