SharePoint Online Software Boundaries and Limits

Size limit and Number of items that can be synced

1.     You can sync up to 20,000 items in your One Drive for Business library. This includes folders and files.

2.   You can sync up to 5,000 items in a SharePoint library. This includes folders and files. These are the libraries that you find on various SharePoint sites, such as team sites and community sites. This also includes syncing other people's One Drive personal sites that you may have access to. You can sync multiple SharePoint libraries.

3.     In any SharePoint library, you can sync files of up to 2 GB

Character limit for files and folders

1. In SharePoint Online, file names can have up to 256 characters
2. Folder names can have up to 250 characters
3. When you sync One Drive for Business with SharePoint Online, a folder named "forms" isn't supported at the root level for a list or library. This occurs because "forms" is a hidden default folder that's used to store templates and forms for the library.
4. Any file that’s currently open by an application (for example, an Excel .xlsx file) can't be synced by One Drive for Business.
5. To sync the file, close any application where the file is currently being used, and then sync the file.
6. The following characters in file names aren't supported when you sync One Drive for Business with SharePoint Online: (\, /, :, *, ?, “, <, >, |, #, %, ~)

SharePoint Online Site Collection

1. SharePoint Online Site collection package details below:

• Small Business: a single Team Site Collection
• Midsize Business plans: limits 20 Team Site Collections
• Enterprise, Education, and Government: limits to 10,000 Team Site Collections

2. In all options, just single Public Web Site Collection can be created, 1TB for My sites, 2000 site/sub site per site collection

Developer Limits

Only Sandbox Solutions are designed to allow SharePoint developer to customize/develop on Office365/SharePoint Online

• No access to file/folder. It means you cannot use IO API commands
• Only be deployed at a site collection level scope (not farm scope)
• No access to web.config
• PDF Documents cannot be opened in the browser
• Restrictions to access security
• Cannot overuse system resources

Storage

The following table describes the limits for SharePoint Online in Office 365 Business Essentials and Office 365 Business Premium:

Feature	Description
Storage per user (contributes to total storage base of tenant)	500 megabytes (MB) per subscribed user
Storage base per tenant	10 GB + 500 MB per subscribed user + additional storage purchased For example, if you have 10,000 users, the base storage allocation is approximately 5 TB (10 GB + 500 MB * 10,000 users) You can purchase an unlimited amount of additional storage
Site collection storage limit	Up to 1 TB per site collection. (25 GB for trial). SharePoint admins can set storage limits for site collections and sites. The minimum storage allocation per site collection is 100 MB
List view threshold limit in site libraries, including files and folders	You can sync up to 5,000 items in site libraries, including folders and files
Site collections (#) per tenant	500,000 site collections (other than personal sites)
Sub sites	Up to 2,000 sub sites per site collection
File upload limit	2 GB per file
Number of external user’s invitees	There is no limit to number of external users you can invite to your SharePoint Online Site Collections