在 Exchange Online 中將 Exchange 2003 信箱轉換為擁有郵件功能的使用者

發行項
04/04/2023

完成分段移轉之後，請將內部部署信箱轉換為擁有郵件功能的使用者，讓內部部署使用者可以自動連線到其雲端信箱。

為何將信箱轉換為擁有郵件功能的使用者？

您必須將已移轉的內部部署信箱轉換為啟用郵件功能的使用者， (MEUS) ，以便使用 Active Directory 管理內部部署組織的雲端式使用者。

本文包含從雲端式信箱收集資訊的 PowerShell 腳本，以及將 Exchange 2003 信箱轉換成 MEUS 的 Visual Basic (VB) 腳本。當您執行此指令碼時，會將雲端式信箱的 Proxy 位址複製到位於 Active Directory 內的 MEU。 MEU 的屬性可讓目錄同步處理符合 MEU 與其對應的雲端信箱。

我們建議您將內部部署信箱轉換為移轉批次的 MEUS。分段 Exchange 移轉批次完成之後，您已確認批次中的所有信箱都已成功移轉，且信箱專案到雲端的初始同步處理已完成，請將移轉批次中的信箱轉換成 MEUS。

收集雲端信箱之資料的 PowerShell 指令碼

使用本節中的腳本來收集雲端式信箱的相關資訊，以及將 Exchange 2003 信箱轉換成 MEUS。

PowerShell 腳本會從您的雲端信箱收集資訊，並將它儲存至 CSV 檔案。請先執行這個指令碼。

將腳本複製到記事本，並將檔案儲存為ExportO365UserInfo.ps1。

注意事項

執行腳本之前，您必須先安裝 Exchange Online PowerShell 模組。如需指示，請參閱安裝和維護 Exchange Online PowerShell 模組。模組會使用新式驗證。

通常，如果您的組織使用 Microsoft 365 或 Microsoft 365 GCC，您可以使用腳本。如果您的組織使用 Office 365 德國、Microsoft 365 GCC High 或 Microsoft 365 DoD，您需要在腳本中編輯 Connect-ExchangeOnline 行。具體而言，您需要使用 ExchangeEnvironmentName 參數和您組織的適當值。如需詳細資訊，請參閱連線至 Exchange Online PowerShell 中的範例。

Param($migrationCSVFileName = "migration.csv")
function O365Logon
{
    #Check for current open O365 sessions and allow the admin to either use the existing session or create a new one
    $session = Get-PSSession | ?{$_.ConfigurationName -eq 'Microsoft.Exchange'}
    if($session -ne $null)
    {
        $a = Read-Host "An open session to Exchange Online PowerShell already exists. Do you want to use this session?  Enter y to use the open session, anything else to close and open a fresh session."
        if($a.ToLower() -eq 'y')
        {
            Write-Host "Using existing Exchange Online Powershell Session." -ForeGroundColor Green
            return
        }
        Disconnect-ExchangeOnline -Confirm:$false
    }
    Import-Module ExchangeOnlineManagement
    Connect-ExchangeOnline
}
function Main
{
    #Verify the migration CSV file exists
    if(!(Test-Path $migrationCSVFileName))
    {
        Write-Host "File $migrationCSVFileName does not exist." -ForegroundColor Red
        Exit
    }
    #Import user list from migration.csv file
    $MigrationCSV = Import-Csv $migrationCSVFileName
    #Get mailbox list based on email addresses from CSV file
    $MailBoxList = $MigrationCSV | %{$_.EmailAddress} | Get-Mailbox
    $Users = @()
    #Get LegacyDN, Tenant, and On-Premises Email addresses for the users
    foreach($user in $MailBoxList)
    {
        $UserInfo = New-Object System.Object
        $CloudEmailAddress = $user.EmailAddresses | ?{($_ -match 'onmicrosoft') -and ($_ -cmatch 'smtp:')}
        if ($CloudEmailAddress.Count -gt 1)
        {
            $CloudEmailAddress = $CloudEmailAddress[0].ToString().ToLower().Replace('smtp:', '')
            Write-Host "$user returned more than one cloud email address. Using $CloudEmailAddress" -ForegroundColor Yellow
        }
        else
        {
            $CloudEmailAddress = $CloudEmailAddress.ToString().ToLower().Replace('smtp:', '')
        }
        $UserInfo | Add-Member -Type NoteProperty -Name LegacyExchangeDN -Value $user.LegacyExchangeDN
        $UserInfo | Add-Member -Type NoteProperty -Name CloudEmailAddress -Value $CloudEmailAddress
        $UserInfo | Add-Member -Type NoteProperty -Name OnPremiseEmailAddress -Value $user.PrimarySMTPAddress.ToString()
        $Users += $UserInfo
    }
    #Check for existing csv file and overwrite if needed
    if(Test-Path ".\cloud.csv")
    {
        $delete = Read-Host "The file cloud.csv already exists in the current directory. Do you want to delete it?  Enter y to delete, anything else to exit this script."
        if($delete.ToString().ToLower() -eq 'y')
        {
            Write-Host "Deleting existing cloud.csv file" -ForeGroundColor Red
            Remove-Item ".\cloud.csv"
        }
        else
        {
            Write-Host "Will NOT delete current cloud.csv file. Exiting script." -ForeGroundColor Green
            Exit
        }
    }
    $Users | Export-CSV -Path ".\cloud.csv" -notype
    (Get-Content ".\cloud.csv") | %{$_ -replace '"', ''} | Set-Content ".\cloud.csv" -Encoding Unicode
    Write-Host "CSV File Successfully Exported to cloud.csv" -ForeGroundColor Green
}
O365Logon
Main

Visual Basic 腳本會將內部部署 Exchange 2003 信箱轉換為 MEUS。執行 PowerShell 腳本以從雲端信箱收集資訊之後，請執行此腳本。

將腳本複製到記事本，並將檔案儲存為Exchange2003MBtoMEU.vbs。

'Globals/Constants
Const ADS_PROPERTY_APPEND = 3
Dim UserDN
Dim remoteSMTPAddress
Dim remoteLegacyDN
Dim domainController
Dim csvMode
csvMode = FALSE
Dim csvFileName
Dim lastADLookupFailed
Class UserInfo
    public OnPremiseEmailAddress
    public CloudEmailAddress
    public CloudLegacyDN
    public LegacyDN
    public ProxyAddresses
    public Mail
    public MailboxGUID
    public DistinguishedName
    Public Sub Class_Initialize()
        Set ProxyAddresses = CreateObject("Scripting.Dictionary")
    End Sub
End Class
'Command Line Parameters
If WScript.Arguments.Count = 0 Then
    'No parameters passed
    WScript.Echo("No parameters were passed.")
    ShowHelp()
ElseIf StrComp(WScript.Arguments(0), "-c", vbTextCompare) = 0 And WScript.Arguments.Count = 2 Then
    WScript.Echo("Missing DC Name.")
    ShowHelp()
ElseIf StrComp(WScript.Arguments(0), "-c", vbTextCompare) = 0 Then
    'CSV Mode
    csvFileName = WScript.Arguments(1)
    domainController = WScript.Arguments(2)
    csvMode = TRUE
    WScript.Echo("CSV mode detected. Filename: " & WScript.Arguments(1) & vbCrLf)
ElseIf wscript.Arguments.Count <> 4 Then
    'Invalid Arguments
    WScript.Echo WScript.Arguments.Count
    Call ShowHelp()
Else
    'Manual Mode
    UserDN = wscript.Arguments(0)
    remoteSMTPAddress = wscript.Arguments(1)
    remoteLegacyDN = wscript.Arguments(2)
    domainController = wscript.Arguments(3)
End If
Main()
'Main entry point
Sub Main
    'Check for CSV Mode
    If csvMode = TRUE Then
        UserInfoArray = GetUserInfoFromCSVFile()
    Else
        WScript.Echo "Manual Mode Detected" & vbCrLf
        Set info = New UserInfo
        info.CloudEmailAddress = remoteSMTPAddress
        info.DistinguishedName = UserDN
        info.CloudLegacyDN = remoteLegacyDN
        ProcessSingleUser(info)
    End If
End Sub
'Process a single user (manual mode)
Sub ProcessSingleUser(ByRef UserInfo)
    userADSIPath = "LDAP://" & domainController & "/" & UserInfo.DistinguishedName
    WScript.Echo "Processing user " & userADSIPath
    Set MyUser = GetObject(userADSIPath)
    proxyCounter = 1
    For Each address in MyUser.Get("proxyAddresses")
        UserInfo.ProxyAddresses.Add proxyCounter, address
        proxyCounter = proxyCounter + 1
    Next
    UserInfo.OnPremiseEmailAddress = GetPrimarySMTPAddress(UserInfo.ProxyAddresses)
    UserInfo.Mail = MyUser.Get("mail")
    UserInfo.MailboxGUID = MyUser.Get("msExchMailboxGUID")
    UserInfo.LegacyDN = MyUser.Get("legacyExchangeDN")
    ProcessMailbox(UserInfo)
End Sub
'Populate user info from CSV data
Function GetUserInfoFromCSVFile()
    CSVInfo = ReadCSVFile()
    For i = 0 To (UBound(CSVInfo)-1)
        lastADLookupFailed = false
        Set info = New UserInfo
        info.CloudLegacyDN = Split(CSVInfo(i+1), ",")(0)
        info.CloudEmailAddress = Split(CSVInfo(i+1), ",")(1)
        info.OnPremiseEmailAddress = Split(CSVInfo(i+1), ",")(2)
        WScript.Echo "Processing user " & info.OnPremiseEmailAddress
        WScript.Echo "Calling LookupADInformationFromSMTPAddress"
        LookupADInformationFromSMTPAddress(info)
        If lastADLookupFailed = false Then
            WScript.Echo "Calling ProcessMailbox"
            ProcessMailbox(info)
        End If
        set info = nothing
    Next
End Function
'Populate user info from AD
Sub LookupADInformationFromSMTPAddress(ByRef info)
    'Lookup the rest of the info in AD using the SMTP address
    Set objRootDSE = GetObject("LDAP://RootDSE")
    strDomain = objRootDSE.Get("DefaultNamingContext")
    Set objRootDSE = nothing
    Set objConnection = CreateObject("ADODB.Connection")
    objConnection.Provider = "ADsDSOObject"
    objConnection.Open "Active Directory Provider"
    Set objCommand = CreateObject("ADODB.Command")
    BaseDN = "<LDAP://" & domainController & "/" & strDomain & ">"
    adFilter = "(&(proxyAddresses=SMTP:" & info.OnPremiseEmailAddress & "))"
    Attributes = "distinguishedName,msExchMailboxGUID,mail,proxyAddresses,legacyExchangeDN"
    Query = BaseDN & ";" & adFilter & ";" & Attributes & ";subtree"
    objCommand.CommandText = Query
    Set objCommand.ActiveConnection = objConnection
    On Error Resume Next
    Set objRecordSet = objCommand.Execute
    'Handle any errors that result from the query
    If Err.Number <> 0 Then
        WScript.Echo "Error encountered on query " & Query & ". Skipping user."
        lastADLookupFailed = true
        return
    End If
    'Handle zero or ambiguous search results
    If objRecordSet.RecordCount = 0 Then
        WScript.Echo "No users found for address " & info.OnPremiseEmailAddress
        lastADLookupFailed = true
        return
    ElseIf objRecordSet.RecordCount > 1 Then
        WScript.Echo "Ambiguous search results for email address " & info.OnPremiseEmailAddress
        lastADLookupFailed = true
        return
    ElseIf Not objRecordSet.EOF Then
        info.LegacyDN = objRecordSet.Fields("legacyExchangeDN").Value
        info.Mail = objRecordSet.Fields("mail").Value
        info.MailboxGUID = objRecordSet.Fields("msExchMailboxGUID").Value
        proxyCounter = 1
        For Each address in objRecordSet.Fields("proxyAddresses").Value
            info.ProxyAddresses.Add proxyCounter, address
            proxyCounter = proxyCounter + 1
        Next
        info.DistinguishedName = objRecordSet.Fields("distinguishedName").Value
        objRecordSet.MoveNext
    End If
    objConnection = nothing
    objCommand = nothing
    objRecordSet = nothing
    On Error Goto 0
End Sub
'Populate data from the CSV file
Function ReadCSVFile()
    'Open file
    Set objFS = CreateObject("Scripting.FileSystemObject")
    Set objTextFile = objFS.OpenTextFile(csvFileName, 1, false, -1)
    'Loop through each line, putting each line of the CSV file into an array to be returned to the caller
    counter = 0
    Dim CSVArray()
    Do While NOT objTextFile.AtEndOfStream
        ReDim Preserve CSVArray(counter)
        CSVArray(counter) = objTextFile.ReadLine
        counter = counter + 1
    Loop
    'Close and return
    objTextFile.Close
    Set objTextFile = nothing
    Set objFS = nothing
    ReadCSVFile = CSVArray
End Function
'Process the migration
Sub ProcessMailbox(User)
    'Get user properties
    userADSIPath = "LDAP://" & domainController & "/" & User.DistinguishedName
    Set MyUser = GetObject(userADSIPath)
    'Add x.500 address to list of existing proxies
    existingLegDnFound = FALSE
    newLegDnFound = FALSE
    'Loop through each address in User.ProxyAddresses
    For i = 1 To User.ProxyAddresses.Count
        If StrComp(address, "x500:" & User.LegacyDN, vbTextCompare) = 0 Then
            WScript.Echo "x500 proxy " & User.LegacyDN & " already exists"
            existingLegDNFound = true
        End If
        If StrComp(address, "x500:" & User.CloudLegacyDN, vbTextCompare) = 0 Then
            WScript.Echo "x500 proxy " & User.CloudLegacyDN & " already exists"
            newLegDnFound = true
        End If
    Next
    'Add existing leg DN to proxy list
    If existingLegDnFound = FALSE Then
        WScript.Echo "Adding existing legacy DN " & User.LegacyDN & " to proxy addresses"
        User.ProxyAddresses.Add (User.ProxyAddresses.Count+1),("x500:" & User.LegacyDN)
    End If
    'Add new leg DN to proxy list
    If newLegDnFound = FALSE Then
        'Add new leg DN to proxy addresses
        WScript.Echo "Adding new legacy DN " & User.CloudLegacyDN & " to existing proxy addresses"
        User.ProxyAddresses.Add (User.ProxyAddresses.Count+1),("x500:" & User.CloudLegacyDN)
    End If
    'Dump out new list of addresses
    WScript.Echo "Original proxy addresses updated count: " & User.ProxyAddresses.Count
    For i = 1 to User.ProxyAddresses.Count
        WScript.Echo " proxyAddress " & i & ": " & User.ProxyAddresses(i)
    Next
    'Delete the Mailbox
    WScript.Echo "Opening " & userADSIPath & " as CDOEXM::IMailboxStore object"
    Set Mailbox = MyUser
    Wscript.Echo "Deleting Mailbox"
    On Error Resume Next
    Mailbox.DeleteMailbox
    'Handle any errors deleting the mailbox
    If Err.Number <> 0 Then
        WScript.Echo "Error " & Err.number & ". Skipping User." & vbCrLf & "Description: " & Err.Description & vbCrLf
        Exit Sub
    End If
    On Error Goto 0
    'Save and continue
    WScript.Echo "Saving Changes"
    MyUser.SetInfo
    WScript.Echo "Refeshing ADSI Cache"
    MyUser.GetInfo
    Set Mailbox = nothing
    'Mail Enable the User
    WScript.Echo "Opening " & userADSIPath & " as CDOEXM::IMailRecipient"
    Set MailUser = MyUser
    WScript.Echo "Mail Enabling user using targetAddress " & User.CloudEmailAddress
    MailUser.MailEnable User.CloudEmailAddress
    WScript.Echo "Disabling Recipient Update Service for user"
    MyUser.PutEx ADS_PROPERTY_APPEND, "msExchPoliciesExcluded", Array("{26491CFC-9E50-4857-861B-0CB8DF22B5D7}")
    WScript.Echo "Saving Changes"
    MyUser.SetInfo
    WScript.Echo "Refreshing ADSI Cache"
    MyUser.GetInfo
    'Add Legacy DN back on to the user
    WScript.Echo "Writing legacyExchangeDN as " & User.LegacyDN
    MyUser.Put "legacyExchangeDN", User.LegacyDN
    'Add old proxies list back on to the MEU
    WScript.Echo "Writing proxyAddresses back to the user"
    For j=1 To User.ProxyAddresses.Count
        MyUser.PutEx ADS_PROPERTY_APPEND, "proxyAddresses", Array(User.ProxyAddresses(j))
        MyUser.SetInfo
        MyUser.GetInfo
    Next
    'Add mail attribute back on to the MEU
    WScript.Echo "Writing mail attribute as " & User.Mail
    MyUser.Put "mail", User.Mail
    'Add msExchMailboxGUID back on to the MEU
    WScript.Echo "Converting mailbox GUID to writable format"
    Dim mbxGUIDByteArray
    Call ConvertHexStringToByteArray(OctetToHexString(User.MailboxGUID), mbxGUIDByteArray)
    WScript.Echo "Writing property msExchMailboxGUID to user object with value " & OctetToHexString(User.MailboxGUID)
    MyUser.Put "msExchMailboxGUID", mbxGUIDByteArray
    WScript.Echo "Saving Changes"
    MyUser.SetInfo
    WScript.Echo "Migration Complete!" & vbCrLf
End Sub
'Returns the primary SMTP address of a user
Function GetPrimarySMTPAddress(Addresses)
    For Each address in Addresses
        If Left(address, 4) = "SMTP" Then GetPrimarySMTPAddress = address
    Next
End Function
'Converts Hex string to byte array for writing to AD
Sub ConvertHexStringToByteArray(ByVal strHexString, ByRef pByteArray)
    Set FSO = CreateObject("Scripting.FileSystemObject")
    Set Stream = CreateObject("ADODB.Stream")
    Temp = FSO.GetTempName()
    Set TS = FSO.CreateTextFile(Temp)
    For i = 1 To (Len (strHexString) -1) Step 2
        TS.Write Chr("&h" & Mid (strHexString, i, 2))
    Next
    TS.Close
    Stream.Type = 1
    Stream.Open
    Stream.LoadFromFile Temp
    pByteArray = Stream.Read
    Stream.Close
    FSO.DeleteFile Temp
    Set Stream = nothing
    Set FSO = Nothing
End Sub
'Converts raw bytes from AD GUID to readable string
Function OctetToHexString (arrbytOctet)
    OctetToHexStr = ""
    For k = 1 To Lenb (arrbytOctet)
        OctetToHexString = OctetToHexString & Right("0" & Hex(Ascb(Midb(arrbytOctet, k, 1))), 2)
    Next
End Function
Sub ShowHelp()
    WScript.Echo("This script runs in two modes, CSV Mode and Manual Mode." & vbCrLf & "CSV Mode allows you to specify a CSV file from which to pull usernames." & vbCrLf& "Manual mode allows you to run the script against a single user.")
    WSCript.Echo("Both modes require you to specify the name of a DC to use in the local domain." & vbCrLf & "To run the script in CSV Mode, use the following syntax:")
    WScript.Echo("  cscript Exchange2003MBtoMEU.vbs -c x:\csv\csvfilename.csv dc.domain.com")
    WScript.Echo("To run the script in Manual Mode, you must specify the users AD Distinguished Name, Remote SMTP Address, Remote Legacy Exchange DN, and Domain Controller Name.")
    WSCript.Echo("  cscript Exchange2003MBtoMEU.vbs " & chr(34) & "CN=UserName,CN=Users,DC=domain,DC=com" & chr(34) & " " & chr(34) & "user@cloudaddress.com" & chr(34) & " " & chr(34) & "/o=Cloud Org/ou=Cloud Site/ou=Recipients/cn=CloudUser" & chr(34) & " dc.domain.com")
    WScript.Quit
End Sub

腳本有何用途？

ExportO365UserInfo.ps1

ExportO365UserInfo.ps1是在雲端式組織中執行的 PowerShell 腳本，可收集您在分段 Exchange 移轉期間移轉的雲端信箱相關資訊。它使用 CSV 檔案仔細探究一批使用者的相關資訊。我們建議您使用您用來移轉一批使用者的相同移轉 CSV 檔案。

當您執行 ExportO365UserInfo 腳本時，會發生下列動作：

針對輸入 CSV 檔案中列出的使用者，會從雲端信箱收集下列屬性：
- 主要 SMTP 位址。
- 對應內部部署信箱的主要 SMTP 位址。
- 雲端信箱的其他 Proxy 位址。
- LegacyExchangeDN
會將收集的屬性儲存到一個名為 Cloud.csv 的 CSV 檔案。

Exchange2003MBtoMEU.vbs

Exchange2003MBtoMEU.vbs是您在內部部署 Exchange 2003 組織中執行的 VB 腳本，可將信箱轉換成 MEUS。它會使用 ExportO365UserInfo.ps1 PowerShell 腳本所產生的Cloud.csv檔案。

當您執行Exchange2003MBtoMEU.vbs腳本時，會針對輸入 CSV 檔案中列出的每個信箱執行下列動作：

會從輸入 CSV 檔案及從內部部署信箱收集資訊。
從內部部署和雲端信箱建立 Proxy 位址清單，以新增到 MEU。
刪除內部部署信箱。
使用下列屬性建立 MEU：
- legacyExchangeDN：來自內部部署信箱的值。
- mail：雲端信箱的主要 SMTP。
- msExchMailboxGuid：來自內部部署信箱的值。
- proxyAddresses：來自內部部署信箱和雲端信箱的值。
- targetAddress：從內部部署信箱讀取;值是雲端信箱的主要 SMTP。
  重要事項
  
  若要啟用從 Exchange Online 返回 Exchange 2003 的離線功能，您需要將 MEU 上的msExchMailboxGuid屬性值取代為雲端信箱中的 GUID。若要取得雲端式信箱的 GUID 值，並將其儲存至 CSV 檔案，請執行下列Exchange Online PowerShell 命令：
```
Get-Mailbox | Select PrimarySmtpAddress,Guid | Export-csv -Path .\guid.csv
```
  此命令會將主要 SMTP 位址和所有雲端信箱的 GUID 擷取到 guid.csv 檔案中，然後將此檔案儲存到目前的目錄。

您可以使用手動模式執行 Exchange2003MBtoMEU.vbs 指令碼，一次轉換一個信箱 (而不是使用輸入 CSV 檔案轉換一批信箱)。如果您選擇此方法，則必須提供下列輸入參數：

內部部署信箱的辨別名稱 (DN)。
雲端信箱的主要 SMTP 位址。
雲端信箱的 Exchange 舊版 DN。
您的 Exchange 2003 組織中的網域控制器名稱。

將內部部署信箱轉換為 MEU 的步驟

在您的Exchange Online組織中執行ExportO365UserInfo.ps1。針對移轉批次使用 CSV 檔案做為輸入檔案。指令碼會建立一個名為 Cloud.csv 的 CSV 檔案。
```
cd <location of the script>

.\ExportO365UserInfo.ps1 <CSV input file>
```
例如：
```
cd c:\data\scripts

.\ExportO365UserInfo.ps1 .\MigrationBatch1.csv
```
將 Exchange2003MBtoMEU.vbs 和 Cloud.csv 複製到您內部部署組織中的同一個目錄中。

在您的內部部署組織中，執行下列命令：

cscript Exchange2003MBtoMEU.vbs -c .\Cloud.csv <FQDN of on-premises domain controller>

例如：

cscript Exchange2003MBtoMEU.vbs -c .\Cloud.csv DC1.contoso.com

若要使用手動模式執行指令碼，請輸入下列命令。在每個值之間使用空格。

cscript Exchange2003MBtoMEU.vbs "<DN of on-premises mailbox>" "<Primary SMTP of cloud mailbox>" "<ExchangeLegacyDN of cloud mailbox>" <FQDN of on-premises domain controller>

例如：

cscript Exchange2003MBtoMEU.vbs "CN=Ann Beebe,CN=Users,DC=contoso,DC=com" "annb@contoso.onmicrosoft.com" "/o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=d808d014cec5411ea6de1f70cc116e7b-annb" DC1.contoso.com

確認已建立新的 MEU。在Active Directory 消費者和電腦中，執行下列步驟：
1. 按一下[動作>尋找]。
2. Click the Exchange tab.
3. Select Show only Exchange recipients, and then select Users with external email address.
4. Click Find Now.
  
  The mailboxes that were converted to MEUs are listed under Search results.
使用Active Directory 消費者和電腦、ASI 編輯或Ldp.exe來確認下列 MEU 屬性已填入正確的資訊：
- legacyExchangeDN
- mail
- msExchMailboxGuid^*
- proxyAddresses
- targetAddress
^* 如先前所述，Exchange2003MBtoMEU.vbs 指令碼會保留內部部署信箱的 msExchMailboxGuid 值。若要啟用從 Microsoft 365 或 Office 365 到 Exchange 2003 的離線功能，您必須將 MEU 上的msExchMailboxGuid屬性值取代為雲端式信箱中的 GUID。