Public/Connect-SkypeOnline.ps1

<#
.SYNOPSIS
Connects to Office365's Skype for Business Online service.
 
.DESCRIPTION
Connect-SkypeOnline uses information provided in the profile of the company specified
to connect to Skype Online.
 
.PARAMETER Company
The company profile to use for connecting.
This parameter supports Tab-Completion.
 
.EXAMPLE
Connect-SkypeOnline -Company ExampleServices
 
 
.NOTES
 
 
#>


function Connect-SkypeOnline {
    [cmdletbinding()]
    Param()
    DynamicParam {
        $ParameterName = 'Company'
        $RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary
        $ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute

        $ParameterAttribute.Mandatory = $true
        $ParameterAttribute.Position = 1

        $AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]
        $AttributeCollection.Add($ParameterAttribute)
        
        $ValidateSet = $Script:Config.Companies.Keys | Where-Object {
            $Script:Config.Companies.$_.O365
        }
        if($ValidateSet.length -gt 0) {
            $ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($ValidateSet)
            $AttributeCollection.Add($ValidateSetAttribute)
        }
 
        $RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter($ParameterName, [string], $AttributeCollection)
        $RuntimeParameterDictionary.Add($ParameterName, $RuntimeParameter)
        return $RuntimeParameterDictionary
    }    
    Begin {
        #OldSessions stay because all commands prefaced by -CSOnline
        $Company = $PSBoundParameters.Company

        #Validation Error handling
        if(
            !$Script:Config.Companies.ContainsKey($Company) -or
            !$Script:Config.Companies.$Company.O365
        ) {
            $message = "There is not a company profile available that supports this cmdlet. Please check your configuration and try again."
            $Param = @{
                ExceptionName = "System.ArgumentException"
                ExceptionMessage = $message
                ErrorId = "SkypeOnlineNoCompaniesAvailable" 
                CallerPSCmdlet = $PSCmdlet
                ErrorCategory = 'InvalidArgument'
            }
            ThrowError @Param
        }

        $CompanyObj = $Script:Config.Companies.$Company
        $ConnectionCredentials = Get-StoredCredential -Target $CompanyObj.O365.CredentialName

        $SBOSession = $false
        if($CompanyObj.O365.Mfa) {
            $SBOSession = New-CsOnlineSession -UserName $ConnectionCredentials.UserName
        }
        else {
            $SBOSession = New-CsOnlineSession -Credential $ConnectionCredentials
        }

        if($SBOSession) {
            $Param = @{
                Session = $SBOSession
                AllowClobber = $true
                DisableNameChecking = $true
            }
            $null = Import-Module (Import-PSSession @Param) -Scope Global -DisableNameChecking
        }
    }
}