EWS API 更新项目附件

Question

我正在尝试删除PF结构中项目上的一些TNEF损坏。我在附加项目上遇到了 TNEF 问题。

我可以找到该项目，加载它，删除属性，但我无法保存附加的项目。

我得到一个例外：

使用"1"参数调用"更新"："不支持此操作 在附件上。

$MSGID = $_
                    $psPropset = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.ItemSchema]::Attachments)
                    $msMessage = [Microsoft.Exchange.WebServices.Data.EmailMessage]::Bind($exchService,$MSGID,$psPropset)
                    $msMessage.load()
                    "This message has attachments :" + $msMessage.hasattachments
                    " "|out-default
                    foreach($attach in $msMessage.Attachments){
                                "Loading attachments :"
                                $attach.Load()
                                        if ($attach.item.itemclass -eq "IPM.note")
                                            {"Found Attached email Message : Checking for TNEF Corruption on attached Message "
                                            $tnefProp1 = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x1204, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::ShortArray)
                                            $tnefProp2 = new-object Microsoft.Exchange.WebServices.Data.ExtendedPropertyDefinition(0x1205, [Microsoft.Exchange.WebServices.Data.MapiPropertyType]::ShortArray)
                                            $attach.Load($tnefProp1,$tnefProp2);
                                                    $propValue1 = $null
                                                    $propValue2 = $null
                                                    $foundProperty1 = $attach.item.TryGetProperty($tnefProp1, [ref]$propValue1)
                                                    $foundProperty2 = $attach.item.TryGetProperty($tnefProp2, [ref]$propValue2)
                                                    if ($foundProperty1 -or $foundProperty2)
                                                    {
                                                        "TNEF props found on item: " + $attach.item.Subject.ToString()
                                                        if ($Fix)
                                                        {
                                                            "    Removing TNEF properties..."
                                                            if ($foundProperty1)
                                                            {
                                                                $attach.item.RemoveExtendedProperty($tnefProp1) | Out-Null
                                                            }
                                                            if ($foundProperty2)
                                                            {
                                                                $attach.item.RemoveExtendedProperty($tnefProp2) | Out-Null
                                                            }

                                                            $attach.item.Update([Microsoft.Exchange.WebServices.Data.ConflictResolutionMode]::AlwaysOverwrite)


                                                            "    Finished removing TNEF properties from this item."
                                                        }
                                                    }
                                            }
                                          else {"Attachment was not an email"}

                                 }


            $msMessage.update([Microsoft.Exchange.WebServices.Data.ConflictResolutionMode]::AlwaysOverwrite)


        }
        }

Answer 1

您无法就地编辑附件。您需要下载附件，将其从项目中删除，编辑下载的副本，然后将其添加为新附件。