DSCResources/MSFT_O365Group/MSFT_O365Group.psm1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $MailNickName,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String[]]
        $ManagedBy,

        [Parameter()]
        [System.String]
        $Description,

        [Parameter()]
        [System.String[]]
        $Members,

        [Parameter()]
        [ValidateSet("Present", "Absent")]
        [System.String]
        $Ensure = "Present",

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Setting configuration of Office 365 Group $DisplayName"
    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $nullReturn = @{
        DisplayName        = $DisplayName
        MailNickName       = $Name
        Description        = $null
        ManagedBy          = $null
        GlobalAdminAccount = $null
        Ensure             = "Absent"
    }

    Test-MSCloudLogin -CloudCredential $GlobalAdminAccount `
        -Platform AzureAD

    $ADGroup = Get-AzureADGroup | Where-Object -FilterScript {$_.MailNickName -eq $MailNickName}
    if ($null -eq $ADGroup)
    {
        $ADGroup = Get-AzureADGroup | Where-Object -FilterScript {$_.DisplayName -eq $DisplayName}
        if ($null -eq $ADGroup)
        {
            Write-Verbose -Message "Office 365 Group {$DisplayName} was not found."
            return $nullReturn
        }
    }
    Write-Verbose -Message "Found Existing Instance of Group {$($ADGroup.DisplayName)}"

    try
    {
        $membersList = Get-AzureADGroupMember -ObjectId $ADGroup.ObjectId
        Write-Verbose -Message "Found Members for Group {$($ADGroup.DisplayName)}"
        $owners = Get-AzureADGroupOwner -ObjectId $ADGroup.ObjectId
        Write-Verbose -Message "Found Owners for Group {$($ADGroup.DisplayName)}"
        $ownersUPN = @()
        if ($null -ne $owners)
        {
            # Need to cast as an array for the test to properly compare cases with
            # a single owner;
            $ownersUPN = [System.String[]]$owners.UserPrincipalName

            # Also need to remove the owners from the members list for Test
            # to handle the validation properly;
            $newMemberList = @()

            foreach ($member in $membersList)
            {
                if (-not $ownersUPN.Contains($member.UserPrincipalName))
                {
                    $newMemberList += $member.UserPrincipalName
                }
            }
        }

        $description = ""
        if ($null -ne $ADGroup.Description)
        {
            $description = $ADGroup.Description.ToString()
        }

        $returnValue = @{
            DisplayName        = $ADGroup.DisplayName
            MailNickName       = $ADGroup.MailNickName
            Members            = $newMemberList
            ManagedBy          = $ownersUPN
            Description        = $description
            GlobalAdminAccount = $GlobalAdminAccount
            Ensure             = "Present"
        }

        Write-Verbose -Message "Retrieved the following instance of the Group:"
        foreach ($value in $returnValue.GetEnumerator())
        {
            Write-Verbose -Message "$($value.Key) = $($value.Value)"
        }
        return $returnValue
    }
    catch
    {
        $Message = "An error occured retrieving info for Group $DisplayName"
        New-M365DSCLogEntry -Error $_ -Message $Message -Source $MyInvocation.MyCommand.ModuleName
    }
    return $nullReturn
}

function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $MailNickName,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String[]]
        $ManagedBy,

        [Parameter()]
        [System.String]
        $Description,

        [Parameter()]
        [System.String[]]
        $Members,

        [Parameter()]
        [ValidateSet("Present", "Absent")]
        [System.String]
        $Ensure = "Present",

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Setting configuration of Office 365 Group $DisplayName"
    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion
    Test-MSCloudLogin -CloudCredential $GlobalAdminAccount `
        -Platform ExchangeOnline

    $currentGroup = Get-TargetResource @PSBoundParameters

    if ($Ensure -eq "Present")
    {
        $CurrentParameters = $PSBoundParameters
        $CurrentParameters.Remove("Ensure")
        $CurrentParameters.Remove("GlobalAdminAccount")

        if ($currentGroup.Ensure -eq "Absent")
        {
            Write-Verbose -Message "Creating Office 365 Group {$DisplayName}"
            $groupParams = @{
                DisplayName = $DisplayName
                Notes       = $Description
                Owner       = $ManagedBy
            }

            $groupParams.Owner = $ManagedBy[0]
            if ("" -ne $MailNickName)
            {
                $groupParams.Add("Name", $MailNickName)
            }
            Write-Verbose -Message "Initiating Group Creation"
            Write-Verbose -Message "Owner = $($groupParams.Owner)"
            New-UnifiedGroup @groupParams
            Write-Verbose -Message "Group Created"
            if ($ManagedBy.Length -gt 1)
            {
                for ($i = 1; $i -lt $ManagedBy.Length; $i++)
                {
                    Write-Verbose -Message "Adding additional owner {$($ManagedBy[$i])} to group."
                    if ("" -ne $Name)
                    {
                        Add-UnifiedGroupLinks -Identity $Name -LinkType Owner -Links $ManagedBy[$i]
                    }
                    else
                    {
                        Add-UnifiedGroupLinks -Identity $DisplayName -LinkType Owner -Links $ManagedBy[$i]
                    }
                }
            }
        }

        if ("" -ne $MailNickName)
        {
            $groupLinks = Get-UnifiedGroupLinks -Identity $MailNickName -LinkType "Members"
        }
        else
        {
            $groupLinks = Get-UnifiedGroupLinks -Identity $DisplayName -LinkType "Members"
        }
        $curMembers = @()
        foreach ($link in $groupLinks)
        {
            if ($link.Name -and $link.Name -ne $currentGroup.ManagedBy)
            {
                $curMembers += $link.Name
            }
        }

        if ($null -ne $CurrentParameters.Members)
        {
            $difference = Compare-Object -ReferenceObject $curMembers -DifferenceObject $CurrentParameters.Members

            if ($null -ne $difference.InputObject)
            {
                Write-Verbose -Message "Detected a difference in the current list of members and the desired one"
                $membersToRemove = @()
                $membersToAdd = @()
                foreach ($diff in $difference)
                {
                    if (-not $ManagedBy.Contains($diff.InputObject))
                    {
                        if ($diff.SideIndicator -eq "<=" -and $diff.InputObject -ne $ManagedBy.Split('@')[0])
                        {
                            Write-Verbose "Will be removing Member: {$($diff.InputObject)}"
                            $membersToRemove += $diff.InputObject
                        }
                        elseif ($diff.SideIndicator -eq "=>")
                        {
                            Write-Verbose "Will be adding Member: {$($diff.InputObject)}"
                            $membersToAdd += $diff.InputObject
                        }
                    }
                }

                if ($membersToAdd.Count -gt 0)
                {
                    if ("" -ne $MailNickName)
                    {
                        Write-Verbose "Adding members {$($membersToAdd.ToString())}"
                        Add-UnifiedGroupLinks -Identity $MailNickName -LinkType Members -Links $membersToAdd
                    }
                    else
                    {
                        Write-Verbose "Adding members {$($membersToAdd.ToString())} with DisplayName"
                        Add-UnifiedGroupLinks -Identity $DisplayName -LinkType Members -Links $membersToAdd
                    }
                }

                if ($membersToRemove.Count -gt 0)
                {
                    if ("" -ne $name)
                    {
                        Remove-UnifiedGroupLinks -Identity $MailNickName -LinkType Members -Links $membersToRemove
                    }
                    else
                    {
                        Remove-UnifiedGroupLinks -Identity $DisplayName -LinkType Members -Links $membersToRemove
                    }
                }
            }
        }
    }
    elseif($Ensure -eq "Absent")
    {
        try
        {
            [array]$existingO365Group = Get-UnifiedGroup -Identity $currentGroup.MailNickName
        }
        catch
        {
            Write-Error -Message "Could not find group $($currrentGroup.MailNickName)"
        }
        if($existingO365Group.Length -eq 1)
        {
            Write-Verbose -Message "Removing O365Group $($existingO365Group.Name)"
            Remove-UnifiedGroup -Identity $existingO365Group.Name -confirm:$false -Force
        }
        else
        {
            Write-Verbose -Message "There was more than one group identified with the name $($currentGroup.MailNickName)."
            Write-Verbose -Message "No action taken. Please remove the group manually."
        }
    }
}

function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $MailNickName,

        [Parameter(Mandatory = $true)]
        [System.String]
        $DisplayName,

        [Parameter()]
        [System.String[]]
        $ManagedBy,

        [Parameter()]
        [System.String]
        $Description,

        [Parameter()]
        [System.String[]]
        $Members,

        [Parameter()]
        [ValidateSet("Present", "Absent")]
        [System.String]
        $Ensure = "Present",

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Testing configuration of Office 365 Group $DisplayName"

    $CurrentValues = Get-TargetResource @PSBoundParameters

    Write-Verbose -Message "Current Values: $(Convert-M365DscHashtableToString -Hashtable $CurrentValues)"
    Write-Verbose -Message "Target Values: $(Convert-M365DscHashtableToString -Hashtable $PSBoundParameters)"

    $TestResult = Test-Microsoft365DSCParameterState -CurrentValues $CurrentValues `
        -Source $($MyInvocation.MyCommand.Source) `
        -DesiredValues $PSBoundParameters

    Write-Verbose -Message "Test-TargetResource returned $TestResult"

    return $TestResult
}

function Export-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )
    $InformationPreference = 'Continue'

    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $content = ''
    Test-MSCloudLogin -CloudCredential $GlobalAdminAccount `
        -Platform AzureAD
    $groups = Get-AzureADGroup -All $true | Where-Object -FilterScript {
        $_.MailNickName -ne "00000000-0000-0000-0000-000000000000"
    }

    $i = 1
    $organization = ""
    $principal = "" # Principal represents the "NetBios" name of the tenant (e.g. the M365DSC part of M365DSC.onmicrosoft.com)
    if ($GlobalAdminAccount.UserName.Contains("@"))
    {
        $organization = $GlobalAdminAccount.UserName.Split("@")[1]

        if ($organization.IndexOf(".") -gt 0)
        {
            $principal = $organization.Split(".")[0]
        }
    }
    foreach ($group in $groups)
    {
        $params = @{
            GlobalAdminAccount = $GlobalAdminAccount
            DisplayName        = $group.DisplayName
            ManagedBy          = "DummyUser"
            MailNickName       = $group.MailNickName
        }
        Write-Information " [$i/$($groups.Length)] $($group.DisplayName)"
        $result = Get-TargetResource @params
        $result.GlobalAdminAccount = "`$Credsglobaladmin"
        $content += " O365Group " + (New-GUID).ToString() + "`r`n"
        $content += " {`r`n"
        $partialContent = Get-DSCBlock -Params $result -ModulePath $PSScriptRoot
        $partialContent = Convert-DSCStringParamToVariable -DSCBlock $partialContent -ParameterName "GlobalAdminAccount"
        if ($partialContent.ToLower().IndexOf($organization.ToLower()) -gt 0)
        {
            $partialContent = $partialContent -ireplace [regex]::Escape("@" + $organization), "@`$OrganizationName"
        }
        if ($partialContent.ToLower().IndexOf($principal.ToLower()) -gt 0)
        {
            $partialContent = $partialContent -ireplace [regex]::Escape("@" + $principal), "@`$(`$OrganizationName.Split('.')[0])"
        }
        $content += $partialContent
        $content += " }`r`n"
        $i++
    }
    return $content
}

Export-ModuleMember -Function *-TargetResource