diff --git a/Active Directory/SIDHistory/Get-ADObjectWithSIDHistory.ps1 b/Active Directory/SIDHistory/Get-ADObjectWithSIDHistory.ps1
new file mode 100644
index 0000000..5160bf0
--- /dev/null
+++ b/Active Directory/SIDHistory/Get-ADObjectWithSIDHistory.ps1	
@@ -0,0 +1,76 @@
+function Get-ADObjectWithSIDHistory {
+    <#
+    .SYNOPSIS
+    Get all Active Directory objects that have SID history.
+
+    .DESCRIPTION
+    This function gets all Active Directory objects that have SID history. It can optionally be filtered to only get
+    user, computer, or group objects.
+
+    .EXAMPLE
+     Get-AllAdSidHistory
+
+     This example gets all Active Directory objects that have SID history.
+
+    .EXAMPLE
+    Get-AllAdSidHistory -Type User
+
+    This example gets all Active Directory user objects that have SID history.
+
+    .EXAMPLE
+    Get-AllAdSidHistory -Type Computer
+
+    This example gets all Active Directory computer objects that have SID history.
+
+    .EXAMPLE
+    Get-AllAdSidHistory -Type Group
+
+    This example gets all Active Directory group objects that have SID history.
+
+    .EXAMPLE
+    Get-AllAdSidHistory -Type All
+
+    This example gets all Active Directory objects that have SID history, regardless of type.
+
+    .NOTES
+    Author: Sam Erde, Sentinel Technologies, Inc.
+    Version: 0.1.0
+    Modified: 2025-01-10
+    #>
+    [CmdletBinding()]
+    [OutputType('Microsoft.ActiveDirectory.Management.ADObject[]')]
+    param (
+        # Type of objects to get. Default is 'All'.
+        [Parameter()]
+        [ValidateSet('All', 'User', 'Computer', 'Group')]
+        [string]
+        $Type = 'All'
+    )
+
+    begin {
+        if (-not (Get-Module -Name ActiveDirectory)) {
+            Write-Verbose -Message 'Importing ActiveDirectory module.'
+            Import-Module ActiveDirectory
+            Write-Verbose -Message '------------------------------'
+            Write-Verbose -Message "Beginning ${MyInvocation.InvocationName}..."
+        }
+
+        $BaseFilter = 'SIDHistory -like "*"'
+        switch ($Type) {
+            'User' { $Filter = "$BaseFilter -and objectClass -eq 'user'" }
+            'Computer' { $Filter = "$BaseFilter -and objectClass -eq 'computer'" }
+            'Group' { $Filter = "$BaseFilter -and objectClass -eq 'group'" }
+            'All' { $Filter = $BaseFilter }
+        }
+    } # end begin
+
+    process {
+        # Get all ActiveDirectory objects that have SID history.
+        [Microsoft.ActiveDirectory.Management.ADObject[]]$ADObjectList = Get-ADObject -Filter $Filter -Properties SIDHistory | Select-Object * -ExpandProperty SIDHistory
+    } # end process
+
+    end {
+        $ADObjectList
+    } # end end
+
+} # end function
diff --git a/Active Directory/Get-AllADSIDHistoryDetail.ps1 b/Active Directory/SIDHistory/Get-AllADSIDHistoryDetail.ps1
similarity index 100%
rename from Active Directory/Get-AllADSIDHistoryDetail.ps1
rename to Active Directory/SIDHistory/Get-AllADSIDHistoryDetail.ps1
diff --git a/Active Directory/Get-AllADSIDHistorySourceDomain.ps1 b/Active Directory/SIDHistory/Get-AllADSIDHistorySourceDomain.ps1
similarity index 100%
rename from Active Directory/Get-AllADSIDHistorySourceDomain.ps1
rename to Active Directory/SIDHistory/Get-AllADSIDHistorySourceDomain.ps1
diff --git a/Active Directory/SIDHistory/Get-SIDHistorySourceDomainList.ps1 b/Active Directory/SIDHistory/Get-SIDHistorySourceDomainList.ps1
new file mode 100644
index 0000000..dcda541
--- /dev/null
+++ b/Active Directory/SIDHistory/Get-SIDHistorySourceDomainList.ps1	
@@ -0,0 +1,70 @@
+function Get-ADObjectWithSIDHistory {
+    <#
+    .SYNOPSIS
+    Get a list of source domain SIDs from all Active Directory objects that have SID history.
+
+    .DESCRIPTION
+    This function gets all Active Directory objects that have SID history and returns a list of unique source domain SIDs.
+
+    .NOTES
+    Author: Sam Erde, Sentinel Technologies, Inc.
+    Version: 0.1.0
+    Modified: 2025-01-10
+    #>
+    [CmdletBinding()]
+    [OutputType('Microsoft.ActiveDirectory.Management.ADObject[]')]
+    param (
+        <#
+        # Type of objects to get. Default is 'All'.
+        [Parameter()]
+        [ValidateSet('All', 'User', 'Computer', 'Group')]
+        [string]
+        $Type = 'All'
+        #>
+    )
+
+    begin {
+        if (-not (Get-Module -Name ActiveDirectory)) {
+            Write-Verbose -Message 'Importing ActiveDirectory module.'
+            Import-Module ActiveDirectory
+            Write-Verbose -Message '------------------------------'
+            Write-Verbose -Message "Beginning ${MyInvocation.InvocationName}..."
+        }
+
+        <# Build the filter for the Get-ADObject cmdlet.
+        $BaseFilter = 'SIDHistory -like "*"'
+        switch ($Type) {
+            'User' { $Filter = "$BaseFilter -and objectClass -eq 'user'" }
+            'Computer' { $Filter = "$BaseFilter -and objectClass -eq 'computer'" }
+            'Group' { $Filter = "$BaseFilter -and objectClass -eq 'group'" }
+            'All' { $Filter = $BaseFilter }
+        }
+        #>
+        $SIDHistorySourceDomainSIDList = [ordered]@{}
+    } # end begin
+
+    process {
+        # Get all ActiveDirectory objects that have SID history.
+        [Microsoft.ActiveDirectory.Management.ADObject[]]$ADObjectList = Get-ADObject -Filter $Filter -Properties SIDHistory | Select-Object * -ExpandProperty SIDHistory
+
+        foreach ($ADObject in $ADObjectList) {
+
+            foreach ($SIDHistoryEntry in $ADObject.SIDHistory) {
+                # Extract the source domain SID from the SIDHistory attribute.
+                $SourceDomainSID = $SIDHistoryEntry.Substring(0, $SIDHistoryEntry.LastIndexOf('-'))
+
+                # Add the source domain SID to the list if it doesn't already exist.
+                if (-not $SIDHistorySourceDomainSIDList.ContainsKey($SourceDomainSID)) {
+                    $SIDHistorySourceDomainSIDList.Add($SourceDomainSID, $SourceDomainSID)
+                }
+            } # end foreach SIDHistoryEntry
+
+        } # end foreach ADObject
+    } # end process
+
+    end {
+        # Update to return the hash table after resolving source domain SIDs.
+        $SIDHistorySourceDomainSIDList.Keys
+    } # end end
+
+} # end function
diff --git a/Active Directory/SIDHistory/Get-TrustedDomainSIDMapping.ps1 b/Active Directory/SIDHistory/Get-TrustedDomainSIDMapping.ps1
new file mode 100644
index 0000000..4004ff0
--- /dev/null
+++ b/Active Directory/SIDHistory/Get-TrustedDomainSIDMapping.ps1	
@@ -0,0 +1,108 @@
+function Get-TrustedDomainSIDMapping {
+    <#
+    .SYNOPSIS
+    Get the SID and DNSRoot name of trusted domains and forests.
+
+    .DESCRIPTION
+    This function retrieves the SID and DNSRoot name of trusted domains and forests in the current Active Directory forest.
+
+    .PARAMETER ManualEntry
+    If specified, the user may manually provide a SID and DNS name to add to the list of domains.
+
+    .EXAMPLE
+    $SIDMappingTable = Get-TrustedDomainSIDMapping -ManualEntry 'S-1-5-21-1234567890-1234567890-1234567890', 'example.com' -Verbose
+
+    This example retrieves the SIDs and DNSRoot names of trusted domains and forests in the current Active Directory forest and adds a manual entry to the results.
+
+    .NOTES
+    Author: Sam Erde, Sentinel Technologies, Inc.
+    Version: 0.0.1
+    Modified: 2024-11-14
+
+    To-Do:
+    - Add support for trusted forests and external trusts.
+    - Add support for manually including a CSV file with trusted domain information.
+    - Add support for exporting a CSV file with trusted domain information.
+    - Add support for taking an array of trusted domain SIDs and DNS root names as input for ManualEntry.
+    #>
+    [CmdletBinding()]
+    param (
+        # If specified, the user may manually provide a SID and DNS name to add to the list of trusted domains.
+        [Parameter(HelpMessage = 'Enter the SID and DNS name of a trusted domain in the format ''S-1-5-21-1234567890-1234567890-1234567890'', ''example.com''.')]
+        [array]$ManualEntry
+    )
+    begin {
+        # Import the ActiveDirectory module if it is not already loaded.
+        if (-not (Get-Module -Name ActiveDirectory)) {
+            Write-Verbose -Message 'Importing ActiveDirectory module.'
+            Import-Module ActiveDirectory
+            Write-Verbose -Message '------------------------------'
+            Write-Verbose -Message 'Beginning to process trusts...'
+        }
+        # Create a dictionary to store domain SIDs with their corresponding DNS root names.
+        $DomainSIDMapping = [ordered] @{}
+        $CurrentDomain = (Get-ADDomain)
+        $DomainSIDMapping.Add(
+            $CurrentDomain.DomainSID.Value,
+            $CurrentDomain.DNSRoot
+        )
+        # If the user provided a manual entry, add it to the dictionary.
+        if ($PSBoundParameters.ContainsKey('ManualEntry')) {
+            Write-Verbose -Message "Manually entered SID: $($ManualEntry[0])"
+            Write-Verbose -Message "Manually entered DNS root name: $($ManualEntry[1])"
+            $DomainSIDMapping.Add(
+                $ManualEntry[0],
+                $ManualEntry[1]
+            )
+        }
+        $Trusts = Get-ADTrust -Filter *
+    }
+    process {
+        # Loop through all trusts and add the trusted domain SIDs and DNS root names to the dictionary.
+        foreach ($trust in $Trusts) {
+            # Need to see if checking SID and DNSRoot requires a different process for trusted forests vs trusted domains.
+            switch ($trust.TrustType) {
+                <#
+                "DomainTrust" {
+                    Write-Verbose -Message "Processing domain trust: $($trust.Target)"
+                    try {
+                        Write-Verbose -Message "Processing trust: $($trust.Target)"
+                        $TrustedDomain = Get-ADDomain -Identity $trust.Target
+                        $DomainSIDMapping.Add(
+                            $TrustedDomain.DomainSID.Value,
+                            $TrustedDomain.DNSRoot
+                        )
+                    } catch {
+                        Write-Warning -Message "$_"
+                        continue
+                    }
+                }
+                "ForestTrust" {
+                    Write-Verbose -Message "Processing forest trust: $($trust.Target)"
+                    # ... (add code to handle external trusts here
+                }
+                "External" {
+                    Write-Verbose -Message "Processing external trust: $($trust.Target)"
+                    # ... (add code to handle external trusts here
+                }
+                #>
+                default {
+                    try {
+                        Write-Verbose -Message "Processing trust: $($trust.Target)"
+                        $TrustedDomain = Get-ADDomain -Identity $trust.Target
+                        $DomainSIDMapping.Add(
+                            $TrustedDomain.DomainSID.Value,
+                            $TrustedDomain.DNSRoot
+                        )
+                    } catch {
+                        Write-Warning -Message "$_"
+                        continue
+                    }
+                }
+            } # end switch ($trust.TrustType)
+        } # end foreach ($trust in $Trusts)
+    } # end process
+    end {
+        $DomainSIDMapping
+    } # end end
+} # end function