I was recently trying to migrate some PowerShell scripts to run in Azure Functions. These scripts needed to call both the Microsoft Graph API & the Microsoft Teams API.
Naturally, I tried to import both the Microsoft.Graph & the MicrosoftTeams cmdlets in the requirements.psd1 file.
@{
'Microsoft.Graph' = '1.22.0'
MicrosoftTeams = '5.0.0'
}My PowerShell script first tries to connect to the Microsoft Graph API, issues some queries & then calls the Teams API.
#connect to the Microsoft Graph API
Connect-MgGraph -AccessToken $graphToken
...
#connect to the Microsoft Teams API
Connect-MicrosoftTeams -AccessTokens @("$graphToken", "$teamsToken")
...Unfortunately, when I tried to run the PowerShell script, I got the following error.
2023-04-03T20:19:34Z [Error] ERROR: Could not load file or assembly 'Microsoft.IdentityModel.JsonWebTokens, Version=6.8.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Could not find or load a specific file. (0x80131621)
Exception :
Type : System.IO.FileLoadException
Message : Could not load file or assembly 'Microsoft.IdentityModel.JsonWebTokens, Version=6.8.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Could not find or load a specific file. (0x80131621)
InvocationInfo :
MyCommand : Connect-MicrosoftTeams
ScriptLineNumber : 6
OffsetInLine : 3
HistoryId : 1
Line : Connect-MicrosoftTeams -AccessTokens @("$GraphToken", "$TeamsToken")
PositionMessage : At C:\home\site\wwwroot\Modules\run.ps1:6 char:3
+ Connect-MicrosoftTeams -AccessTokens @("$GraphToken", "$TeamsToken" …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~The PowerShell script was able to successfully connect to the Microsoft Graph API, but errors out when it tries to connect to the Microsoft Teams API.
Turns out the Microsoft.Graph & MicrosoftTeams cmdlets use different & incompatible DLLs (Microsoft.IdentityModel.JsonWebTokens and others).
Solution is to run two different Azure Functions, each with only 1 of those cmdlets loaded. This ensures each one gets its own runtime and appropriate DLL versions loaded.