内容搜索的限制Limits for Content search

各种限制适用于 Microsoft 365 合规中心的内容搜索工具。Various limits are applied to the Content search tool in the Microsoft 365 compliance center. 这包括在"内容"搜索页上运行的搜索和与核心电子数据展示页面上电子数据展示案例 关联的 搜索。This includes searches run on the Content search page and searches that are associated with an eDiscovery case on the Core eDiscovery page. 这些限制有助于维护提供给组织的服务的运行状况和质量。These limits help to maintain the health and quality of services provided to organizations. 还有一些限制与在 Exchange Online 中为电子邮件编制索引以用于搜索相关。There are also limits related to the indexing of email messages in Exchange Online for search. 不能修改内容搜索或电子邮件索引的限制,但应注意这些限制,以便可以在规划、运行内容搜索和排除内容搜索故障时考虑这些限制。You can't modify the limits for Content Search or email indexing, but you should be aware of them so that you can take these limits into consideration when planning, running, and troubleshooting content searches.

搜索限制Search limits

下表列出了在 Microsoft 365 合规中心内使用内容搜索工具和与核心电子数据展示案例关联的搜索时搜索限制。The following table lists the search limits when using the content search tool in the Microsoft 365 compliance center and for searches that are associated with a Core eDiscovery case.

限制说明Description of limit 限制Limit
可以在单个搜索中搜索的最大邮箱或网站数The maximum number of mailboxes or sites that can be searched in a single search
无限制 1No limit 1
可同时在组织中运行的最大搜索数。The maximum number of searches that can run at the same time in your organization.
3030
可同时运行的组织范围搜索的最大数量。The maximum number of organization-wide searches that can be run at the same time.
33
单个用户可以同时启动的最大搜索数。The maximum number of searches that a single user can start at the same time. 当用户尝试使用安全与合规中心 PowerShell 中的 Get-ComplianceSearch | Start-ComplianceSearch 命令启动多个搜索时,&达到此限制。This limit is most likely hit when the user tries to start multiple searches by using the Get-ComplianceSearch | Start-ComplianceSearch command in Security & Compliance Center PowerShell.
10 10
预览内容搜索结果时,预览页面上显示每个用户邮箱的最大项目数。The maximum number of items per user mailbox that are displayed on the preview page when previewing Content Search results.
100100
预览搜索结果时,在预览页面上显示的在用户邮箱中发现的最大项目数。The maximum number of items found in all user mailboxes that are displayed on the preview page when previewing search results. 显示最新项目。The newest items are displayed.
1,0001,000
可以预览搜索结果的用户邮箱最大数目。The maximum number of user mailboxes that can be previewed for search results. 如果有 1000 个以上的邮箱包含与搜索查询相匹配的内容,只能预览前 1000 个邮箱中的大部分搜索结果。If there are more than 1000 mailboxes that contain content that matches the search query, only the top 1000 mailboxes with the most search results will be available for preview.
1,0001,000
预览搜索结果时,在预览页面上显示的 SharePoint 和 OneDrive for Business 网站中发现的最大项目数。The maximum number of items found in SharePoint and OneDrive for Business sites that are displayed on the preview page when previewing search results. 显示最新项目。The newest items are displayed.
200200
SharePoint 和 OneDrive for Business (可预览) OneDrive for Business 网站的最大数量。The maximum number of sites (in SharePoint and OneDrive for Business) that can be previewed for search results. 如果包含与搜索查询匹配的内容的网站总数超过 200 个,则只有搜索结果最多的前 200 个网站可供预览。If there are more than 200 total sites that contain content that matches the search query, only the top 200 sites with the most search results will be available for preview.
200200
预览内容搜索结果时,预览页面上显示每个公用文件夹邮箱的最大项目数。The maximum number of items per public folder mailbox that are displayed on the preview page when previewing content search results.
100100
预览内容搜索结果时在预览页面上显示的所有公用文件夹邮箱中发现的最大项目数。The maximum number of items found in all public folder mailboxes that are displayed on the preview page when previewing content search results.
200200
可预览搜索结果的公共邮箱的最大数量。The maximum number of public mailboxes that can be previewed for search results. 如果超过 500 个公用文件夹邮箱包含与搜索查询匹配的内容,则只有搜索结果最多的前 500 个公用文件夹邮箱可供预览。If there are more than 500 public folder mailboxes that contain content that matches the search query, only the top 500 public folder mailboxes with the most search results will be available for preview.
500500
搜索查询查询的最大字符数 (包括用于搜索) 运算符和条件。The maximum number of characters for the search query (including operators and conditions) for a search.

注意: 此限制在扩展查询后生效,这意味着将针对每个关键字扩展查询。Note: This limit takes effect after the query is expanded, which means the query will get expanded against each of the keywords. 例如,如果搜索查询包含 15 个关键字和其他参数和条件,则查询将展开 15 次,每个扩展次数与查询中的其他参数和条件一起。For example, if a search query has 15 keywords and additional parameters and conditions, the query gets expanded 15 times, each with the other parameters and conditions in the query. 因此,即使搜索查询中的字符数可能低于此限制,扩展的查询也可能超出此限制。So even though the number of characters in search query may be below the limit, it's the expanded query that may contribute to exceeding this limit.
邮箱 :10,000Mailboxes: 10,000
网站: 搜索所有网站时为 4,000,搜索最多 20 个网站时为 2,000 2Sites: 4,000 when searching all sites or 2,000 when searching up to 20 sites 2
使用前缀通配符在搜索查询中搜索精确短语时,或者使用前缀通配符和 NEAR 布尔运算符时返回的最大变量数。Maximum number of variants returned when using a prefix wildcard to search for an exact phrase in a search query or when using a prefix wildcard and the NEAR Boolean operator.
10,000 310,000 3
前缀通配符的最小 alpha 字符数;例如, time* one* 、 或 set*The minimum number of alpha characters for prefix wildcards; for example, time*, one*, or set*.
33
搜索中的最大邮箱数,您可以通过使用 New-ComplianceSearchAction -Purge 命令 (执行"搜索和清除"操作来删除) 。The maximum number of mailboxes in a search that you can delete items in by doing a "search and purge" action (by using the New-ComplianceSearchAction -Purge command). 如果要执行清除操作搜索的源邮箱数超过此限制,则清除操作将失败。If the search that you're doing a purge action for has more source mailboxes than this limit, the purge action will fail. 有关搜索和清除功能详细信息,请参阅在组织中 搜索和删除电子邮件For more information about search and purge, see Search for and delete email messages in your organization.
50,00050,000
搜索中可以导出项目的最大位置数。The maximum number of locations in a search that you can export items from. 如果要导出的搜索位置超过此限制,导出将失败。If the search that you're exporting has more locations than this limit, the export will fail. 有关详细信息,请参阅导出 内容搜索结果For more information, see Export content search results.
100,000100,000

备注

1 尽管可以在一次搜索中搜索无限数量的邮箱,但使用 Microsoft 365 合规中心中的电子数据展示导出工具,只能从最多 100,000 个邮箱下载导出的搜索结果。1 Although you can search an unlimited number of mailboxes in a single search, you can only download the exported search results from a maximum of 100,000 mailboxes using the eDiscovery Export Tool in the Microsoft 365 compliance center. 若要从超过 100,000 个邮箱下载搜索结果,您必须使用安全&中心 PowerShell。To download the search results from more than 100,000 mailboxes, you have to use Security & Compliance Center PowerShell. 有关详细信息和示例脚本,请参阅 从超过 100,000个邮箱导出结果。For more information and a sample script, see Exporting results from more than 100,000 mailboxes.

2 在搜索 SharePoint 和 OneDrive for Business 位置时,所搜索网站的 URL 中的字符数计入此限制。2 When searching SharePoint and OneDrive for Business locations, the characters in the URLs of the sites being searched are counted against this limit.

3 对于非短语 (使用不使用双引号的关键字) 我们使用了特殊的前缀索引。3 For non-phrase queries (a keyword value that doesn't use double quotation marks) we use a special prefix index. 这将告诉我们一个单词在文档中出现,而不是在文档中出现位置。This tells us that a word occurs in a document, but not where it occurs in the document. 若要对包含双引号 (关键字值执行短语查询) ,我们需要比较短语中单词在文档中的位置。To do a phrase query (a keyword value with double quotation marks), we need to compare the position within the document for the words in the phrase. 这意味着不能将前缀索引用于短语查询。This means that we can't use the prefix index for phrase queries. 在这种情况下,我们使用前缀扩展到的所有可能的单词在内部扩展查询;例如, "time*" 可以展开到 "time OR timer OR times OR timex OR timeboxed OR …"In this case, we internally expand the query with all possible words that the prefix expands to; for example, "time*" can expand to "time OR timer OR times OR timex OR timeboxed OR …". 10000 是指单词可以扩展到的变体最大数量,而不是与查询匹配的文档数量。10,000 is the maximum number of variants the word can expand to, not the number of documents matching the query. 非短语搜索词没有上限。There is no upper limit for non-phrase terms.

搜索时间Search times

Microsoft 收集所有组织运行的搜索的性能信息。Microsoft collects performance information for searches run by all organizations. 尽管搜索查询的复杂性可能会影响搜索项,但是影响搜索所需时长的最大因素仍然是搜索的邮箱数。While the complexity of the search query can impact search times, the biggest factor that affects how long searches take is the number of mailboxes searched. 尽管 Microsoft 不提供用于搜索次数的服务级别协议,但下表根据搜索中包含的邮箱数列出了集合搜索的平均搜索时间。Although Microsoft doesn't provide a Service Level Agreement for search times, the following table lists average search times for collection searches based on the number of mailboxes included in the search.

邮箱数Number of mailboxes 平均搜索时间Average search time
100100 30 秒30 seconds
1,0001,000 45 秒45 seconds
10,00010,000 4 分钟4 minutes
25,00025,000 10 分钟10 minutes
50,00050,000 20 分钟20 minutes
100,000100,000 25 分钟25 minutes

导出限制Export limits

下表列出了导出内容搜索结果时的限制。The following table lists the limits when exporting the results of a content search. 当您从核心电子数据展示案例导出内容时,这些限制也适用。These limits also apply when you export content from a Core eDiscovery case.

限制说明Description of limit 限制Limit
单个搜索中可导出的最大数据量Maximum amount of exportable data from a single search

注意: 如果搜索结果大于 2 TB,请考虑使用日期范围或其他类型的筛选器来减小搜索结果的总大小。Note: If the search results are larger than 2 TB, consider using date ranges or other types of filters to decrease the total size of the search results.
2 TB2 TB
组织在一天中可以导出的最大数量Maximum an organization can export in a single day

注意: 此限制每天在 UTC 时间 12:00 重置Note: This limit is reset daily at 12:00AM UTC
2 TB2 TB
可同时在组织中运行的最大并发导出数Maximum concurrent exports that can be ran at same time within your organization

注意: 运行" 仅报告 "针对组织的并发导出总数进行导出计数。Note: Running a Report Only export counts against total concurrent exports for your organization. 如果三个用户分别执行 3 个导出,则只能执行其他一个导出。If three users are performing 3 exports each, then only one other export can be performed. 无论是导出报表还是搜索结果,在导出报告或搜索结果之前,都不得执行其他导出操作。Whether it is exporting a report or search results, no other exports can be performed until one has completed.
10 10
单个用户每次可运行的最大导出数Maximum exports a single user can run at any one time
33
可以使用电子数据展示导出工具下载的搜索结果的最大邮箱数Maximum number of mailboxes for search results that can be downloaded using the eDiscovery Export Tool

注意: 若要从超过 100,000 个邮箱下载搜索结果,您必须使用安全&中心 PowerShell。Note: To download the search results from more than 100,000 mailboxes, you have to use Security & Compliance Center PowerShell. 有关说明,请参阅 从超过 100,000个邮箱导出结果。For instructions, see Exporting results from more than 100,000 mailboxes.
100,000100,000
可以导出的 PST 文件的最大大小Maximum size of PST file that can be exported

注意: 如果用户邮箱中的搜索结果大于 10 GB,则邮箱的搜索结果将在两个或多个单独的 PST 文件中导出 () 导出。Note: If the search results from a user's mailbox are larger than 10 GB, the search results for the mailbox will be exported in two (or more) separate PST files. 如果选择在单个 PST 文件中导出所有搜索结果,则当搜索结果的总大小大于 10 GB 时,PST 文件将被放入其他 PST 文件中。If you choose to export all search results in a single PST file, the PST file will be spilt into additional PST files if the total size of the search results is larger than 10 GB. 如果要更改此默认大小,可以在用于导出搜索结果的计算机上编辑 Windows 注册表。If you want to change this default size, you can edit the Windows Registry on the computer that you use to export the search results. 请参阅 在导出电子数据展示搜索结果时更改 PST 文件的大小See Change the size of PST files when exporting eDiscovery search results. 特定邮箱的搜索结果不会在多个 PST 文件之间划分,除非来自单个邮箱的内容超过 10 GB。The search results from a specific mailbox won't be divided among multiple PST files unless the content from a single mailbox is more than 10 GB. 如果选择将搜索结果导出到包含单个文件夹中所有邮件的一个 PST 文件中,并且搜索结果大于 10 GB,则仍按时间顺序组织项目,因此这些项目将基于发送日期被分入其他 PST 文件。If you chose to export the search results in one PST file for that contains all messages in a single folder and the search results are larger than 10 GB, the items are still organized in chronological order, so they will be spilt into additional PST files based on the sent date.
10 GB10 GB
邮箱和网站的搜索结果上传到 Microsoft 提供的 Azure 存储位置的速率。Rate at which search results from mailboxes and sites are uploaded to a Microsoft-provided Azure Storage location. 每小时最多 2 GBMaximum of 2 GB per hour

电子邮件的索引限制Indexing limits for email messages

下表介绍了索引限制,这些限制可能会导致电子邮件作为未编制索引的项目或部分索引的项目返回到内容搜索的结果中。The following table describes the indexing limits that might result in an email message being returned as an unindexed item or a partially indexed item in the results of a content search.

索引限制Indexing limit 最大值Maximum value 说明Description
最大附件大小Maximum attachment size 150 MB150 MB
用于分析索引的电子邮件附件的最大大小。The maximum size of an email attachment that will parse for indexing. 任何大于此限制的附件将不会被分析为索引,并且包含附件的邮件将被标记为部分索引。Any attachment that's larger than this limit won't be parsed for indexing, and the message with the attachment will be marked as partially indexed.

注意: 分析是索引服务从附件中提取文本、删除标点符号和空格等不必要的字符,然后在名为词汇切分) 的过程中将文本划分为单词 (的过程,然后将这些字符存储在索引中。Note: Parsing is the process where the indexing service extracts text from the attachment, removes unnecessary characters like punctuation and spaces, and then divides the text into words (in a process called tokenization), that are then stored in the index.
最大附件数Maximum number of attachments
250250
附加到电子邮件的最大文件数,将进行分析以编制索引。The maximum number of files attached to an email message that will be parsed for indexing. 如果邮件的附件超过 250 个,则对前 250 个附件进行分析和索引,邮件会标记为部分索引,因为它具有未分析的其他附件。If a message has more than 250 attachments, the first 250 attachments are parsed and indexed, and the message is marked as partially indexed because it had additional attachments that weren't parsed.
最大附件深度Maximum attachment depth
3030
分析的最大嵌套附件数。The maximum number of nested attachments that are parsed. 例如,如果电子邮件附加了另一封邮件,并且附加的邮件有一个附加的 Word 文档,则 Word 文档和附加的邮件将被索引。For example, if an email message has another message attached to it and the attached message has an attached Word document, the Word document and the attached message will be indexed. 此行为将针对最多 30 个嵌套附件继续。This behavior will continue for up to 30 nested attachments.
附加图像的最大数量Maximum number of attached images
00
附加到电子邮件的图像将被分析程序跳过,并且不会编制索引。An image that's attached to an email message is skipped by the parser and isn't indexed.
分析项目所花费的最大时间Maximum time spent parsing an item
30 秒30 seconds
分析项目以编制索引最多需要 30 秒。A maximum of 30 seconds is spent parsing an item for indexing. 如果分析时间超过 30 秒,该项目将标记为部分索引。If the parsing time exceeds 30 seconds, the item is marked as partially indexed.
最大分析程序输出Maximum parser output
200 万个字符2 million characters
来自已编制索引分析程序的文本输出的最大量。The maximum amount of text output from the parser that's indexed. 例如,如果分析程序从文档中提取了 800 万个字符,则只对前 200 万个字符编制索引。For example, if the parser extracted 8 million characters from a document, only the first 2 million characters are indexed.
最大批注令牌数Maximum annotation tokens
200 万2 million
当对电子邮件编制索引时,每个单词都使用不同的处理指令进行批注,这些指令指定该单词的索引编制方式。When an email message is indexed, each word is annotated with different processing instructions that specify how that word should be indexed. 每组处理指令都称为注释令牌。Each set of processing instructions is called an annotation token. 若要在 Office 365 中维护服务质量,电子邮件的注释令牌限制为 200 万个。To maintain the quality of service in Office 365, there is a limit of 2 million annotation tokens for an email message.
索引中的最大正文大小Maximum body size in index
6700 万个字符67 million characters
电子邮件正文及其所有附件中的字符总数。The total number of characters in the body of an email message and all its attachments. 当对电子邮件编制索引时,邮件正文中以及所有附件的所有文本都连接在一个字符串中。When an email message is indexed, all text in the body of the message and in all attachments is concatenated into a single string. 索引的此字符串的最大大小为 6700 万个字符。The maximum size of this string that is indexed is 67 million characters.
正文中的最大唯一标记数Maximum unique tokens in body
100 万1 million
如前所述,令牌是从内容中提取文本、删除标点和空格,然后将它划分为存储在索引中的 (称为) 标记"的单词的结果。As previously explained, tokens are the result of extracting text from content, removing punctuation and spaces, and then dividing it into words (called tokens) that are stored in the index. 例如,短语包含 "cat, mouse, bird, dog, dog" 5 个标记。For example, the phrase "cat, mouse, bird, dog, dog" contains 5 tokens. 但是只有 4 个唯一令牌。But only 4 of these are unique tokens. 每封电子邮件有 100 万个唯一令牌的限制,这有助于防止索引使用随机令牌变得过大。There is a limit of 1 million unique tokens per email message, which helps prevent the index from getting too large with random tokens.

更多信息More information

还有一些与内容搜索的各个方面相关的其他限制,如内容索引。There are additional limits related to different aspects of searching for content, such as content indexing. 有关这些限制详细信息,请参阅下列主题:For more information about these limits, see the following topics:

有关内容搜索的信息,请参阅:For information about content searches, see:

有关与核心电子数据展示和高级电子数据展示相关的案例限制,请参阅:For case limits related to Core eDiscovery and Advanced eDiscovery, see: