Sample loading extracted ExchangeOnline module

https://www.powershellgallery.com/packages/ExchangeOnlineManagement/3.0.0

Manual Download / Download the raw nupkg file

• Save with extension .zip
• Make sure to go to Properties / check the Unblock and click Apply (otherwise won't execute)
• Extract to folder (you could delete _rels, package, xml + nuspec in root)
• Set appsettings.json / ExOConnectSettings / ModulePath, eg "c:\\yourextracfolder\\ExchangeOnlineManagement.psd1"

appSettings.Development.json sample

{
  "DetailedErrors": true,
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "ExOConnectSettings": {
    "PfxPath": "D:\\GitWorkspace\\sample.pfx",
    "PfxPassword": "",
    "AppId": "guidforpfxhere",
    "Organization": "youronmsdomainhere.onmicrosoft.com",
    "ModulePath": "D:\\GitWorkspace\\_exo3module_unpacked\\ExchangeOnlineManagement.psd1"
  }
}

Connect-ExchangeOnline Observations

• NOTE that New-EXOModule in ExchangeOnlineManagement.psm1 loads dynamic psd1 and psm1 from the Internet
• DO put a breakpoint on an EXO call, then dive into the newly downloaded %temp%/tmpEXO_* folder created by New-EXOModule
• DO open ExchangeOnlineManagement.psm1, search for Get-HelpFiles and comment that line. That loads less stuff.
• DO USE SkipLoadingFormatData on Connect-ExchangeOnline. That loads less stuff.

And... carefully read the next section!

Load Testing Observations

There would be often the error You must call Connect-ExchangeOnline before calling any other cmdlet. when running bombardier. Turns out this is related to calling Disconnect-ExchangeOnline - it internally (implemented in ExchangeOnlineManagement.psm1) has a call to

# Remove all ConnectionContexts
# this internally clears all the active tokens in ConnectionContexts
[Microsoft.Exchange.Management.ExoPowershellSnapin.ConnectionContextFactory]::RemoveAllConnectionContexts()

This method is using a static list to manage connections, and guess what, that leads to all existing connection tokens to be killed while those are still in use in other PowerShell instances (same process after all, thank you static).

So - either do not call Disconnect-ExchangeOnline or comment that line in the psm1.