Office365的日常维护里会经常看到对象，用户、邮箱、设备、组等，属性里的串号，比如S-1-5-21-3773200467-1648347138-33xxxxxxx-xxxxxxx。
在此汇总整理了Office 365里各种对象，偶尔做查询的时候可能会用到。
| 属性名 | Get-User -identity UPN | Get-msoluser -UserPrincipalName UPN | Get-AzureADUser -ObjectId | get-Mailbox MB | Get-MailboxStatistics |
| SID | S-1-5-21-4256315605-418659178-39xxxxxxxx-xxxxxxxx | ||||
| SidHistory | {S-1-5-21-3773200467-1648347138-333333xxxx-xxxxxxx} | ||||
| NetID | 10030000XXXXXXXX | 10030000XXXXXXXX | |||
| LiveID | 10030000XXXXXXXX | ||||
| ExternalDirectoryObjectId | 4985db36-c7de-4908-af66-dddfxxxxxxxx | 4985db36-c7de-4908-af66-dddfxxxxxxxx | |||
| ExchangeObjectId | f440025a-f329-4630-beb6-faf5xxxxxxxx | f440025a-f329-4630-beb6-faf5xxxxxxxx | |||
| Guid | 8ca90255-037d-47c2-b498-07cexxxxxxxx | 8ca90255-037d-47c2-b498-07cexxxxxxxx | |||
| ImmutableId | 4trSZbfxak+GWiXXXXXXXX== | 4trSZbfxak+GWiXXXXXXXX== | |||
| ObjectId | 4985db36-c7de-4908-af66-dddfxxxxxxxx | 4985db36-c7de-4908-af66-dddfxxxxxxxx | |||
| OnPremisesSecurityIdentifier | S-1-5-21-2122325276-1589206055-nnnnnnnnn-nnnn | ||||
| DatabaseGuid | 48b50f69-8b67-477d-xxxx-18c2xxxxxxxx | ||||
| ExchangeGuid | fc6650ef-31e2-4c1b-xxxx-5972xxxxxxxx | ||||
| DataEncryptionPolicyId | a18bd849-a818-4bda-xxxx-e84fxxxxxxxx | ||||
| ContainerBehaviorTypeId | 2731f30d-f6a8-44a7-xxxx-6c4cxxxxxxxx | ||||
| MailboxGuid | fc6650ef-31e2-4c1b-xxxx-5972xxxxxxxx | ||||
| OwnerADGuid | f440025a-f329-4630-beb6-faf5xxxxxxxx | ||||
| Identity | fc6650ef-31e2-4c1b-xxxx-5972xxxxxxxx | ||||
| MapiIdentity | fc6650ef-31e2-4c1b-xxxx-5972xxxxxxxx | ||||
| ExternalDirectoryOrganizationId | 8eb73218-837f-41d8-xxxx-1c1fxxxxxxxx | ||||