Could not load file or assembly 'Microsoft.Graph.Authentication, Version=

Copper Contributor

Hi All,


not able to run Graph powershell cmdlet post updating. 


getting below error:

New-MgUserAuthenticationPhoneMethod : Could not load file or assembly 'Microsoft.Graph.Authentication, Version=, Culture=neutral,
PublicKeyToken=ASFFFSSFFF' or one of its dependencies. The system cannot find the file specified.
At line:1 char:1
+ New-MgUserAuthenticationPhoneMethod
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [New-MgUserAuthe..._CreateExpanded], FileNotFoundException
+ FullyQualifiedErrorId : Microsoft.Graph.PowerShell.Cmdlets.NewMgUserAuthenticationPhoneMethod_CreateExpanded

1 Reply
there were multiple versions of MS graphs were installed which caused the issue. post complete uninstallation and reinstallation of MS graph resolved the issue.