Add/Remove Exchange Mailbox Delegate Access

AddDelegateAccess.psm1

<#
.SYNOPSIS
  Assign full access to a mailbox with automapping disabled
.DESCRIPTION
  Assigns full delegate access for a user to another user's mailbox,
  with automapping disabled so that it doesn't pull into Outlook.
  Must be run from Exchange Online PowerShell Module!!!
.PARAMETER adminAccount
  The email of the administrator account with permission to perform this
.PARAMETER accountGainingAccess
  The email of the user getting permission to delegate
.PARAMETER targetAccount
  The email of the mailbox to grant delegate access to
.EXAMPLE
  AddDelegateAccess
.EXAMPLE
  AddDelegateAccess -adminAccount testadmin@test.com -targetAccount test@test.com -accountGainingAccess testuser@test.com
#>
function AddDelegateAccess {
  param(
    [Parameter(Mandatory = $true)]
    [string] $adminAccount,
    [Parameter(Mandatory = $true)]
    [string] $accountGainingAccess,
    [Parameter(Mandatory = $true)]
    [string] $targetAccount
  )

  Connect-ExchangeOnline -UserPrincipalName $adminAccount
  Add-MailboxPermission -Identity $targetAccount -User $accountGainingAccess -AccessRights FullAccess -AutoMapping:$false
  Add-RecipientPermission -Identity $targetAccount -Trustee $accountGainingAccess -AccessRights SendAs
  Get-PSSession | Remove-PSSession
}

Export-ModuleMember -Function AddDelegateAccess

RemoveDelegateAccess.psm1

<#
.SYNOPSIS
  Remove access to a mailbox
.DESCRIPTION
  Removes delegate access for a user to another user's mailbox
.PARAMETER adminAccount
  The email of the administrator account with permission to perform this
.PARAMETER targetAccount
  The name of the mailbox to remove access from
.PARAMETER accountLosingAccess
  The user to remove access for
.EXAMPLE
  RemoveDelegateAccess
.EXAMPLE
  RemoveDelegateAccess -adminAccount testadmin@test.com -targetAccount test@test.com -accountLosingAccess testuser@test.com
#>
function RemoveDelegateAccess {
  param(
    [Parameter(Mandatory = $true)]
    [string] $adminAccount,
    [Parameter(Mandatory = $true)]
    [string] $accountLosingAccess,
    [Parameter(Mandatory = $true)]
    [string] $targetAccount
  )

  Connect-ExchangeOnline -UserPrincipalName $adminAccount
  Remove-MailboxPermission -Identity $targetAccount -User $accountLosingAccess -AccessRights FullAccess
  Remove-RecipientPermission -Identity $targetAccount -Trustee $accountLosingAccess -AccessRights SendAs
  Get-PSSession | Remove-PSSession
}

Export-ModuleMember -Function RemoveDelegateAccess