CODEWITHSUNDEEP
powershellazureadalazure-automation
BenV
BenV

Reputation: 12452

ADAL in Azure Automation: Type not loading intermittantly

I'm working on an Azure Automation script where I need to retrieve an access token to call the AAD Graph API. I wanted to use ADAL to do this so I zipped up Microsoft.IdentityModel.Clients.ActiveDirectory.dll and uploaded it as a module. When I run from the test blade, it sometimes works, and sometimes fails with this error:

New-Object : Cannot find type [Microsoft.IdentityModel.Clients.ActiveDirectory.ClientCredential]: verify that the 
assembly containing this type is loaded.
At line:22 char:9
+ $cred = New-Object Microsoft.IdentityModel.Clients.ActiveDirectory.ClientCredent ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidType: (:) [New-Object], PSArgumentException
    + FullyQualifiedErrorId : TypeNotFound,Microsoft.PowerShell.Commands.NewObjectCommand

When it fails I just run it again and it works. Now I've published and scheduled this runbook as a daily job 3 days ago. So far it has failed every day with this same error.

Has any one else seen this? Any suggestions on next steps?

Upvotes: 3

Views: 5491

Answers (1)

BenV
BenV

Reputation: 12452

I fixed this by adding the following line to my script:

Add-Type -Path "C:\Modules\User\Microsoft.IdentityModel.Clients.ActiveDirectory\Microsoft.IdentityModel.Clients.ActiveDirectory.dll"

Still not sure why it was working intermittently before. I guess depending on what else was going on ADAL may or may not have been loaded?

Upvotes: 1

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