SharePoint Document Issues

What Happens to SharePoint Sites During a Root Site Swap?

Algirdas JasaitisAlgirdas Jasaitis Nov 2, 2026 870 views

Question details

The user wants to know if other SharePoint Online site collections will experience downtime or become unavailable when the tenant root site is being replaced.

What Happens to SharePoint Sites During a Root Site Swap?
Product
SharePoint Online
Device & OS
not provided
Scenario
Performing a SharePoint Online root site replacement (root site swap).
Observed behavior
Ensuring uninterrupted access to other site collections and the SharePoint start page during the administrative process.
Before you start

Ensure you have the necessary global administrator or SharePoint administrator privileges before initiating a root site replacement in the SharePoint admin center.

Solution 1Recommended

Understand Site Availability During a Root Site Swap

Clarification on what remains accessible and what experiences temporary downtime during the process.

When you swap the SharePoint Online root site, the process is designed to minimize disruption to your tenant. Testing and official documentation confirm that swapping the root site does not cause a tenant-wide outage. Other SharePoint site collections remain fully functional and accessible to users.

However, the current root site and the newly designated replacement root site may experience temporary unavailability while the URL routing is updated.

1
Check other site collections

Navigate to any other SharePoint site collection. These will remain accessible and operational throughout the root site swap.

2
Access the SharePoint start page

The main SharePoint start page remains active and accessible to users, ensuring they can still find their frequently visited sites.

3
Monitor the source and target root sites

Expect brief HTTP 404 errors or redirection delays specifically on the original root site and the new target site while the background swap process completes.

Understand Site Availability During a Root Site Swap
Temporary Impact: Only the original root site and the replacement site are directly affected. Users actively working on these two specific sites should save their work prior to the swap to prevent data loss.
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Frequently Asked Questions

How long does a SharePoint root site swap take?

The time required for a root site swap depends on the size and complexity of the sites involved, but the actual URL redirect usually takes only a few minutes. Full search indexing for the newly swapped site may take slightly longer.

Can I revert a root site swap if something goes wrong?

There is no direct 'undo' button. If you need to revert, you must perform another root site swap, swapping the current root site back with the archived original root site.

Will users lose permissions during a root site replacement?

No, site permissions are retained during the swap. The target site replaces the root site URL, but its existing permissions and content structures remain intact.

Does a root site swap affect OneDrive for Business?

No, user OneDrive for Business URLs and files are completely separate from the tenant root site and are not impacted during a root site swap.