New Enforcement of SharePoint Site Limits SharePoint recommends a maximum of 2,000 lists and libraries per site, and 2,000 subsites per site. These have been long standing limits for SharePoint but have not been formally enforced. There have been cases where some sites exceeded these limits, resulting in poor site performance and low-quality viewing experience. One of the most impacted areas is the API performance that degrades significantly when users access data on the sites that exceed their recommended limits. The API calls may time out or get throttled, blocking the users from opening the site or resulting in unexpected failures. In some extreme cases, the issue can impact functionalities beyond these sites. To ensure site performance and help customers have the best possible experience, Microsoft will implement a safeguard to prevent customers from exceeding these limits. Once these limits are enforced, sites that exceed the limit of 2,000 lists and libraries will no longer be able to have new libraries or lists added to the site. Similarly, any site that exceeds the limit of 2,000 subsites will no longer be able to have new subsites added to the site. When a site reaches these limits, users will see the following message on SharePoint web: Libraries, lists, and subsites that have been created before the enforcement rollout and exceed the corresponding limit, will continue to function and their access will not be blocked. The change will only impact the creation of new lists, libraries or subsites outside the approved limits starting in November. These new additions will get blocked at the time of creation once the site reaches the corresponding limit. The enforcement of the limits will start in early November and will be completely enforced by late December. Contact us to learn more: 202.293.5003 x4 sales@madwolf.com More links Microsoft 365 Blog