From 4.6.7 on, premium and multisite users can enable cross-domain cookie consent* For multisite users. This is done under Complianz settings. For premium users, please read the below instructions.
For the time being, this is only available for subfolders, with subdomains being available in the future.
What is cross-domain cookie consent?
Cross-domain cookie consent will store consent settings from a single user over a range of different domains, or in this case, subfolders. This will mean a user consents for domain A, and these settings will be set for Domain B as well, thus only showing the consent banner once.
For most privacy laws, cross-domain consent is prohibited because the probability Domain A & Domain B actually share the same configuration of functional/non-functional cookies, processors, service providers, and the like is minimal.
We have seen multisite users with identical set-ups over multiple subfolders, which prompted this feature. In the future, we will add subdomains as we have seen these cases pop-up as well.
Enabling cross-domain cookie consent with Premium
To enable cross-domain cookie consent for the premium plugin on Domain A and subfolders, you will need to add a line to your functions.php, child functions.php, or as a mu-plugin to all WordPress installations.
To enable cross-domain consent, you will need to define the policy ID to be shared on different installations.
update_option( 'complianz_active_policy_id', 20 );
This will set the policy ID for your domain and subfolders.