I like being able to report to our clients exactly what the permissions on mailboxes are. The only issue with reporting via the Office 365 admin portal is that we don’t get a history. I’ve decided to make sure that I can do this by documenting the permissions daily.

To do this, I have two versions of the script; one for IT-Glue and one for general HTML file usage. Both scripts connect to the Office365 Exchange PowerShell using the Secure App Model. For more information you can check this blog post.

IT-Glue version

The IT-Glue version gets all contacts in your IT-Glue environment, compares these to the domains found in each of your partner tenants and documents the permissions for the right tenant into the correct IT-Glue client. The script creates a Flexible Asset for you if it does not yet exist.

$key                   = "YOUR IT Glue Key here"
$ApplicationId         = 'Application ID'
$ApplicationSecret     = 'Application Secret' | Convertto-SecureString -AsPlainText -Force
$TenantID              = 'YourTenantID'
$RefreshToken          = 'YourRefreshTokens'
$ExchangeRefreshToken  = 'YourExchangeRefresherToken'
$upn                   = 'UPN-That-Generated-Tokens'
$APIEndpoint           = "https://api.eu.itglue.com"
$FlexAssetName         = "Office365 Permissions - Automatic Documentation"
#######################################################################
write-output "Getting Module"
If (Get-Module -ListAvailable -Name "ITGlueAPI") { Import-module ITGlueAPI } Else { install-module ITGlueAPI -Force; import-module ITGlueAPI }
If (Get-Module -ListAvailable -Name "MsOnline") { Import-module "Msonline" } Else { install-module "MsOnline" -Force; import-module "Msonline" }
If (Get-Module -ListAvailable -Name "PartnerCenter") { Import-module "PartnerCenter" } Else { install-module "PartnerCenter" -Force; import-module "PartnerCenter" }
Write-Output "Generating tokens to login"
$credential = New-Object System.Management.Automation.PSCredential($ApplicationId, $ApplicationSecret)
$aadGraphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.windows.net/.default' -ServicePrincipal -Tenant $tenantID 
$graphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.microsoft.com/.default' -ServicePrincipal -Tenant $tenantID 
Add-ITGlueBaseURI -base_uri $APIEndpoint
Add-ITGlueAPIKey $key
write-output "Getting IT-Glue contact list"
$i = 0
do {
    $AllITGlueContacts += (Get-ITGlueContacts -page_size 1000 -page_number $i).data.attributes
    $i++
    Write-Host "Retrieved $($AllITGlueContacts.count) Contacts" -ForegroundColor Yellow
}while ($AllITGlueContacts.count % 1000 -eq 0 -and $AllITGlueContacts.count -ne 0) 
Write-Output "Checking if flexible asset exists."
$FilterID = (Get-ITGlueFlexibleAssetTypes -filter_name $FlexAssetName).data
if (!$FilterID) { 
Write-Output "No Flexible Asset found. Creating new one"
    $NewFlexAssetData = 
@{
    type = 'flexible-asset-types'
    attributes = @{
            name = $FlexAssetName
            icon = 'sitemap'
            description = $description
    }
    relationships = @{
        "flexible-asset-fields" = @{
            data = @(
                @{
                    type       = "flexible_asset_fields"
                    attributes = @{
                        order           = 1
                        name            = "tenantid"
                        kind            = "Text"
                        required        = $true
                        "show-in-list"  = $true
                        "use-for-title" = $true
                    }
                },
                @{
                    type       = "flexible_asset_fields"
                    attributes = @{
                        order          = 2
                        name           = "permissions"
                        kind           = "Textbox"
                        required       = $false
                        "show-in-list" = $true
                    }
                },
                @{
                    type       = "flexible_asset_fields"
                    attributes = @{
                        order          = 3
                        name           = "tenant-name"
                        kind           = "Text"
                        required       = $false
                        "show-in-list" = $false
                    }
                }
            )
            }
        }
          
   }
    New-ITGlueFlexibleAssetTypes -Data $NewFlexAssetData 
    $FilterID = (Get-ITGlueFlexibleAssetTypes -filter_name $FlexAssetName).data
}


write-output "Logging in."
Connect-MsolService -AdGraphAccessToken $aadGraphToken.AccessToken -MsGraphAccessToken $graphToken.AccessToken
$customers = Get-MsolPartnerContract -All 
   
foreach ($customer in $customers) {
    $MSOLPrimaryDomain = (get-msoldomain -TenantId $customer.tenantid | Where-Object { $_.IsInitial -eq $false }).name
    $customerDomains = Get-MsolDomain -TenantId $customer.TenantId | Where-Object { $_.status -contains "Verified" }
    $MSOLtentantID = $customer.tenantid
    #Connecting to the O365 tenant
    $InitialDomain = Get-MsolDomain -TenantId $customer.TenantId | Where-Object { $_.IsInitial -eq $true }
    Write-host "Documenting $($Customer.Name)"
    $token = New-PartnerAccessToken -ApplicationId 'a0c73c16-a7e3-4564-9a95-2bdf47383716'-RefreshToken $ExchangeRefreshToken -Scopes 'https://outlook.office365.com/.default' -Tenant $customer.TenantId
    $tokenValue = ConvertTo-SecureString "Bearer $($token.AccessToken)" -AsPlainText -Force
    $credential = New-Object System.Management.Automation.PSCredential($upn, $tokenValue)
    $customerId = $customer.DefaultDomainName
    $session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri "https://ps.outlook.com/powershell-liveid?DelegatedOrg=$($customerId)&BasicAuthToOAuthConversion=true" -Credential $credential -Authentication Basic -AllowRedirection
    Import-PSSession $session -CommandName "Get-MailboxPermission", "Get-Mailbox" -AllowClobber
    $Mailboxes = Get-Mailbox -ResultSize:Unlimited | Sort-Object displayname

    foreach ($mailbox in $mailboxes) {
        $AccesPermissions = Get-MailboxPermission -Identity $mailbox.identity | Where-Object { $_.user.tostring() -ne "NT AUTHORITY\SELF" -and $_.IsInherited -eq $false } -erroraction silentlycontinue | Select-Object User, accessrights
        if ($AccesPermissions) { $HTMLPermissions += $AccesPermissions | convertto-html -frag -PreContent "<h4>Permissions on $($mailbox.PrimarySmtpAddress)</h4>" | Out-String }
    }
    Remove-PSSession $session

    $FlexAssetBody =
    @{
        type       = 'flexible-assets'
        attributes = @{
            traits = @{
                'permissions' = $HTMLPermissions
                'tenantid'    = $MSOLtentantID
                'tenant-name' = $initialdomain.name
            }
        }
    }


    write-output "             Finding $($customer.name) in IT-Glue"
    $orgID = @()
    foreach ($customerDomain in $customerdomains) {
        $orgID += ($AllITGlueContacts | Where-Object { $_.'contact-emails'.value -match $customerDomain.name }).'organization-id' | Select-Object -Unique

    }



    write-output "             Uploading Office Permission $($customer.name) into IT-Glue"
    foreach ($org in $orgID) {
        $ExistingFlexAsset = (Get-ITGlueFlexibleAssets -filter_flexible_asset_type_id $($filterID.ID) -filter_organization_id $org).data | Where-Object { $_.attributes.traits.'tenant-name' -eq $initialdomain.name }
        #If the Asset does not exist, we edit the body to be in the form of a new asset, if not, we just upload.
        if (!$ExistingFlexAsset) {
            $FlexAssetBody.attributes.add('organization-id', $org)
            $FlexAssetBody.attributes.add('flexible-asset-type-id', $($filterID.ID))
            write-output "                      Creating new Office Permission $($customer.name) into IT-Glue organisation $org"
            New-ITGlueFlexibleAssets -data $FlexAssetBody
        }
        else {
            write-output "                      Updating Office Permission $($customer.name) into IT-Glue organisation $org"
            $ExistingFlexAsset = $ExistingFlexAsset[-1]
            Set-ITGlueFlexibleAssets -id $ExistingFlexAsset.id  -data $FlexAssetBody
        }

    }
    $MSOLPrimaryDomain = $null
    $MSOLtentantID = $null
    $AccesPermissions = $null
    $HTMLPermissions = $null 
}

General HTML version

The generic HTML version makes a HTML file per client in C:\Temp. It uses the name of the client as the filename.

$ApplicationId         = 'ApplicationID'
$ApplicationSecret     = 'ApplicationSecret' | Convertto-SecureString -AsPlainText -Force
$TenantID              = 'YourTenantID'
$RefreshToken          = 'RefreshToken'
$ExchangeRefreshToken  = 'ExchangeRefreshToken'
$upn                   = 'YourUPN'
#######################################################################
write-output "Getting Modules"
If (Get-Module -ListAvailable -Name "MsOnline") { Import-module "Msonline" } Else { install-module "MsOnline" -Force; import-module "Msonline" }
If (Get-Module -ListAvailable -Name "PartnerCenter") { Import-module "PartnerCenter" } Else { install-module "PartnerCenter" -Force; import-module "PartnerCenter" }
Write-Output "Generating tokens to login"
$credential = New-Object System.Management.Automation.PSCredential($ApplicationId, $ApplicationSecret)
$aadGraphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.windows.net/.default' -ServicePrincipal -Tenant $tenantID 
$graphToken = New-PartnerAccessToken -ApplicationId $ApplicationId -Credential $credential -RefreshToken $refreshToken -Scopes 'https://graph.microsoft.com/.default' -ServicePrincipal -Tenant $tenantID 
write-output "Logging in."
Connect-MsolService -AdGraphAccessToken $aadGraphToken.AccessToken -MsGraphAccessToken $graphToken.AccessToken
$customers = Get-MsolPartnerContract -All 
$head = @"
<script>
function myFunction() {
    const filter = document.querySelector('#myInput').value.toUpperCase();
    const trs = document.querySelectorAll('table tr:not(.header)');
    trs.forEach(tr => tr.style.display = [...tr.children].find(td => td.innerHTML.toUpperCase().includes(filter)) ? '' : 'none');
  }</script>
<title>Audit Log Report</title>
<style>
body { background-color:#E5E4E2;
      font-family:Monospace;
      font-size:10pt; }
td, th { border:0px solid black; 
        border-collapse:collapse;
        white-space:pre; }
th { color:white;
    background-color:black; }
table, tr, td, th {
     padding: 2px; 
     margin: 0px;
     white-space:pre; }
tr:nth-child(odd) {background-color: lightgray}
table { width:95%;margin-left:5px; margin-bottom:20px; }
h2 {
font-family:Tahoma;
color:#6D7B8D;
}
.footer 
{ color:green; 
 margin-left:10px; 
 font-family:Tahoma;
 font-size:8pt;
 font-style:italic;
}
#myInput {
  background-image: url('https://www.w3schools.com/css/searchicon.png'); /* Add a search icon to input */
  background-position: 10px 12px; /* Position the search icon */
  background-repeat: no-repeat; /* Do not repeat the icon image */
  width: 50%; /* Full-width */
  font-size: 16px; /* Increase font-size */
  padding: 12px 20px 12px 40px; /* Add some padding */
  border: 1px solid #ddd; /* Add a grey border */
  margin-bottom: 12px; /* Add some space below the input */
}
</style>
"@
foreach ($customer in $customers) {
    $MSOLPrimaryDomain = (get-msoldomain -TenantId $customer.tenantid | Where-Object { $_.IsInitial -eq $false }).name
    $customerDomains = Get-MsolDomain -TenantId $customer.TenantId | Where-Object { $_.status -contains "Verified" }
    $MSOLtentantID = $customer.tenantid
    #Connecting to the O365 tenant
    $InitialDomain = Get-MsolDomain -TenantId $customer.TenantId | Where-Object { $_.IsInitial -eq $true }
    Write-host "Documenting $($Customer.Name)"
    $token = New-PartnerAccessToken -ApplicationId 'a0c73c16-a7e3-4564-9a95-2bdf47383716'-RefreshToken $ExchangeRefreshToken -Scopes 'https://outlook.office365.com/.default' -Tenant $customer.TenantId
    $tokenValue = ConvertTo-SecureString "Bearer $($token.AccessToken)" -AsPlainText -Force
    $credential = New-Object System.Management.Automation.PSCredential($upn, $tokenValue)
    $customerId = $customer.DefaultDomainName
    $session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri "https://ps.outlook.com/powershell-liveid?DelegatedOrg=$($customerId)&BasicAuthToOAuthConversion=true" -Credential $credential -Authentication Basic -AllowRedirection
    Import-PSSession $session -CommandName "Get-MailboxPermission", "Get-Mailbox" -AllowClobber
    $Mailboxes = Get-Mailbox -ResultSize:Unlimited | Sort-Object displayname
    $MSOLPrimaryDomain = $null
    $MSOLtentantID = $null
    $AccesPermissions = $null
    $HTMLPermissions = $null
    foreach ($mailbox in $mailboxes) {
        $AccesPermissions = Get-MailboxPermission -Identity $mailbox.identity | Where-Object { $_.user.tostring() -ne "NT AUTHORITY\SELF" -and $_.IsInherited -eq $false } -erroraction silentlycontinue | Select-Object User, accessrights
        if ($AccesPermissions) { $HTMLPermissions += $AccesPermissions | convertto-html -frag -PreContent "<h4>Permissions on $($mailbox.PrimarySmtpAddress)</h4>" | Out-String }
    }
    Remove-PSSession $session
    $CompleteHTML = $head,$HTMLPermissions | Out-String | out-file "C:\Temp\$($customer.name).html"
} 

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Kelvin Tegelaar

I am a Microsoft Certified System Engineer working as the CTO of the Managed Services Provider Lime Networks B.V. in the Netherlands. I mostly enjoy automating business processes by deploying PowerShell solutions, but just have a large passion for Microsoft Technology in general.

If you want to contact me directly you can find me on twitter here, or via email: Kelvin {at} limenetworks.nl

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Latest posts by Kelvin Tegelaar (see all)

• Monitoring with PowerShell: Monitoring users that are blocked for login - January 20, 2020
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• Documenting with PowerShell: Handling IT-Glue API security and rate limiting. - January 11, 2020