[BUG] Latest azure-functions-host broke Connect-PnPOnline

[Chrdik78]

Reporting an Issue or Missing Feature

I now its because of underlying dependencies but I'd like to report an issue regarding 'Connect-PnPOnline' within an Azure functions. This occurs after a runtime update a week ago.

Expected behavior

A returned connection to the tenant or a specific SharePoint Site.

Actual behavior

The connection fails with "Method not found: 'Microsoft.Extensions.DependencyInjection.IServiceCollection Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.AddOptions(Microsoft.Extensions.DependencyInjection.IServiceCollection)'."

I tried a clean import after the Azure function has been loaded and I tried to start a new process, but that did not solve the problem.

I am loading the PnP.PowerShell module from a local wwwroot/MODELS folder but also tried auto dependency handling using the built-in features.

The same combination of libraries (including AZ modules to connect to KeyVault) work fine on a local machine.

Steps to reproduce behavior

Connect-PnPOnline [-pars].

I am using a certificate (base64) which worked for a long time and as a work-around I am trying to switch to use an AccessToken, but I like how Connect-PnPOnline handles all situations untill a week ago.

What is the version of the Cmdlet module you are running?

2.x and 3.2.0

Which operating system/environment are you running PnP PowerShell on?

• Windows
• Linux
• MacOS
• Azure Cloud Shell
• Azure Functions
• Other : please specify

[Chrdik78]

I will swith to a managed identity, but I want to ask, no one has this issue?

[harunibtomorri]

We are using the managed identity and from 2026-07-07 11:45:07 we are getting this error. We have define the PNP version in the requirements.psd1 file.
We tried to downgrade the PNP module but still receiving the error.

[Chrdik78]

I am now switching to isolated using .NET 10. I expect scripts working the same, but I need to rewrite some code to be able to use environment vars and inject them. Will update when it works.

https://learn.microsoft.com/en-us/azure/azure-functions/dotnet-isolated-process-guide?tabs=ihostapplicationbuilder%2Cconfig%2Cwindows

[harunibtomorri]

Hope it will help.
Our Azure functions are already migrated to .NET 10 with PowerShell 7.6

[benceroth]

The issue lies in the Azure Function Runtime version and PnP package compatibility. In Azure they have deprecated the last available version containing a dependency with Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.AddOptions method. As a result reducing PowerShell version to 7.4, even pinning the Function Runtime version to the oldest available does not help.

There is no way I found so far to avoid the automatic dependency import of this new version; creation of clean sub-processes are not supported by Azure Function to circumvent the issue.

As this is a compatibility issue, it would be appreciated to investigate and align PnP package for Function Runtimes (versions: 4.1051.300.26316).

[DavidSchmidt1]

We are having the same problem, using Powershell Azure Functions. Any Updates on this?

[gautamdsheth]

Can you try with the latest version that was released yesterday , 3.3.0 ? Also, if you are not using Az modules or Graph modules or some other 3rd party , maybe try disabling them from requirements file , maybe that helps , not sure if we can do anything about this.

[DavidSchmidt1]

We tried to use 3.3.0 and also 3.3.1-nightly both still throw the same error.
We have to use some required Az Modules, which can sadly not be replaced.

Our Environment looks like this:

Azure Functions v4, PowerShell worker 7.6
Extension Bundle: Microsoft.Azure.Functions.ExtensionBundle [4.0.0, 5.0.0)
OS: Windows (Azure hosted)
Required Az modules (cannot be replaced): Az.Accounts 5.5.0, Az.Resources 10.0.0, Az.Storage 9.7.0, Az.KeyVault 6.5.0
Versions tried — all fail with the same error:

PnP.PowerShell 2.12.0
PnP.PowerShell 3.2.0
PnP.PowerShell 3.3.0
PnP.PowerShell 3.3.1-nightly

I understand that this error comes from Microsoft site, but this info maybe helps anyway

[DavidSchmidt1]

FYI the root cause has been identified Azure/azure-functions-powershell-worker#1144

[kalimba-script]

Hey, I'm also having the same issue, the Connect-PnPOnline command is failing with the error "Method not found: 'Microsoft.Extensions.DependencyInjection.IServiceCollection
Microsoft.Extensions.DependencyInjection.OptionsServiceCollectionExtensions.AddOptions(Microsoft.Extensions.DependencyInjection.IServiceCollection)'.

If I'm reading this thread right, this is an issue with Microsoft depreciating the last Azure Function Runtime version that has this dependency that PnP PowerShell needs. I tried adjusting the Azure Function Runtime version to an earlier release version and 4.1048.300 does get rid of the dependency error, but doesn't fix my script. It looks like Connect-PnPOnline command is just silently failing now, getting a wave of red text stating that I'm not signed in and to please use Connect-PnPOnline to connect.

I tried the workaround of that root cause and setting Az.Accounts to 5.5.0 isn't working for me, I even commented out all of the Az modules I was loading and I'm still getting the same error.

[gautamdsheth]

Could please try out with the latest nightly builds (3.3.2 or later) and let me know if that helps ? We made some changes to code to make it work better with other modules.

@DavidSchmidt1 - this is very useful info for us. We have had similar issues earlier and we fixed it but looks like it is happening again due to a different update. Earlier one was due to Graph module.

[DavidSchmidt1]

Thanks for the update.

We changed the package reference to 3.3.2-nightly, with the required Az modules (cannot be replaced): Az.Accounts 5.5.0, Az.Resources 10.0.0, Az.Storage 9.7.0, Az.KeyVault 6.5.0

And the dependency error seems to be gone, thanks for that!

But we now face a different error, which seems to be related, since it worked previously:
Unable to find type [Microsoft.SharePoint.Client.ScriptSafeDomainEntityData].

[gautamdsheth]

@DavidSchmidt1 - is it specific to a cmdlet ? If so , which cmdlet is this ? Also, did you try other cmdlets, are they also working ok ? Locally, in PS 7.6.3 , I tried with Az , MgGraph and PnP modules, all seems to work.