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Understanding the Limitations of SAPs and Private Domains

As noted in the question, the limit is one SAP per BU, which can be a constraint when trying to share subdomains. However, Private Domains can be used as a standalone solution to enable authenticated sender subdomains without the need for an SAP.

The root cause of this challenge is the limitation of one SAP per BU, which can be overcome by using Private Domains as a separate solution.

It is essential to note that Private Domains do not provide IP, link branding, or other features that come with an SAP. However, if you only need the authenticated sender subdomain, Private Domains can be a suitable solution.

Configuring Private Domains for Shared Subdomains

To configure Private Domains for shared subdomains, you will need to purchase Private Domain SKUs and work with SFMC to configure them with the desired subdomains. You can then use these Private Domains in the third BU to send emails from the shared subdomains.

As mentioned in the replies, it is crucial to consider the implications of using Private Domains, such as the need for multi-bounce domain configuration to prevent DMARC issues.

Step-by-Step Solution

Checklist for Configuring Private Domains

• Purchase Private Domain SKUs for each subdomain you want to share.
• Configure the Private Domains with the desired subdomains.
• Set up the Private Domains in the third BU.
• Configure multi-bounce domain to prevent DMARC issues.
• Test and verify the setup.
• Monitor and maintain the Private Domains and subdomains.

Frequently Asked Questions

Can I use an SAP and a Private Domain in the same BU?

Yes, you can use an SAP and a Private Domain in the same BU, but they will serve different purposes.

Do I need to purchase a separate Private Domain SKU for each subdomain?

Yes, you will need to purchase a separate Private Domain SKU for each subdomain you want to share.

Can I use a Private Domain without an SAP in the same BU?

Yes, you can use a Private Domain without an SAP in the same BU, but you will not have the benefits of link branding and IP.

How do I configure multi-bounce domain for Private Domains?

You will need to work with SFMC to configure multi-bounce domain for your Private Domains.

Can I use Private Domains with other SFMC features?

Yes, you can use Private Domains with other SFMC features, such as Journey Builder and Automation Studio.