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Prerequisites

The PowerShellModuleName variable must already be defined or one of the following values must be set:

$PowerShellModuleName = 'ExchangeOnlineManagement'

Install the PowerShell module

Run the following commands to verify the NuGet provider is installed:

Find-PackageProvider -Name 'NuGet' -Force -ForceBootstrap

Modify then run the following commands to define the name Run the following commands to trust the PSGallery:

Set-PSRepository -Name 'PSGallery' -InstallationPolicy Trusted

Run the following commands to locate any installed instance of the PowerShell module

$ModuleIsInstalled = Get-Module -Name $PowerShellModuleName -ListAvailable

Run the following commands to locate any active instance of the PowerShell module:

$PowerShellModuleName$ModuleIsActive = 'ExchangeOnlineManagement' Get-Module -Name $PowerShellModuleName

Run the following commands to unload any active instance of the PowerShell modulesmodule

If ($ModuleIsActive) { Remove-Module -Name $PowerShellModuleName -Force }

Run the code blocks in one of the following sections commands to update or install the latest version of the Graph PowerShell modules module from the PSGallery: 

...

If ($ModuleIsInstalled) { Update-Module -Name $PowerShellModuleName 

...

To install or reinstall the modules:

...

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-Verbose } Else { Install-Module -Name $PowerShellModuleName -

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Verbose }