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How to Set Up Separate SharePoint Home Sites for Subdomains in One Tenant
Question details
The user wants to establish distinct SharePoint home sites and independent sign-in experiences for various subdomains within a single Microsoft 365 tenant.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Managing multiple brands or subdomains within one Microsoft 365 tenant and attempting to provide isolated SharePoint portal landing pages for each.
- Observed behavior
- Microsoft 365 does not natively support assigning separate SharePoint home sites or unique sign-in experiences for individual subdomains within a single tenant.
Evaluate your organization's data isolation requirements to determine if internal site redirection is sufficient, or if strict separation requires setting up a completely new tenant.
Use Power Automate for Custom Site Redirection
Since native multiple home site configuration is not supported, you can use Power Automate to direct users to specific SharePoint Hub Sites based on their subdomain.
While a single tenant can only feature one official SharePoint home site, you can set up distinct Hub Sites to act as sub-home sites for each domain.
Using automation flows allows you to conditionally route users when they log in, providing a customized experience without splitting the tenant.
Set up a separate SharePoint Hub Site for each subdomain or brand within your existing tenant.
Create a new automated flow triggered when a user accesses the primary portal.
Configure the flow to read the user's Entra ID (Azure AD) profile attributes, such as their assigned domain or department.
Add a redirection action that automatically sends the user to the specific Hub Site URL corresponding to their profile.
Migrate to Separate Tenants for Complete Isolation
If you require entirely independent sign-in experiences and isolated home sites, migrating the subdomain to its own separate tenant is the only native solution.
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Frequently Asked Questions
Can a single Microsoft 365 tenant have multiple SharePoint home sites?
No, Microsoft 365 natively supports only one designated official SharePoint home site per tenant. You must use Hub Sites or custom routing mechanisms to simulate the experience of having multiple home sites.
Can I customize the Microsoft 365 sign-in page for different subdomains in one tenant?
While you can apply custom company branding to the tenant's login screen, providing entirely independent sign-in pages (with different logos and backgrounds) tailored to a user's specific subdomain is not natively supported within a single tenant.
Does migrating to a new tenant transfer my user profiles and application settings automatically?
No, while tenant-to-tenant migration tools can move user accounts, mailboxes, and SharePoint data, complete user profiles, personalized application settings, and customized environments typically require manual reconfiguration.
What is the best alternative to creating multiple SharePoint home sites?
The standard architectural alternative is to register one global home site and configure multiple SharePoint Hub Sites beneath it. Each Hub Site can then serve as a dedicated intranet landing page for a specific brand, subdomain, or department.
