Scenario
You wish to use Azure Active Directory (Azure AD) Dynamic Groups with Signature 365 but are unsure if these are supported.
Solution
Signature 365 fully supports Azure AD Dynamic Groups. You can use Dynamic Groups to create groups with attribute-based memberships and then import these groups for use in rules in Signature 365.
More information
In Azure AD, you can create complex attribute-based rules to enable dynamic memberships for groups. Dynamic group membership reduces the administrative overhead of adding and removing users. You can set up a rule for dynamic membership on security groups or Microsoft 365 groups.
When any attributes of a user change, the system evaluates all dynamic group rules in a directory to see if the change would trigger any group adds or removes. If a user satisfies a rule on a group, they are added as a member of that group. If they no longer satisfy the rule, they are removed. You cannot manually add or remove a member of a dynamic group.
The feature requires an Azure AD Premium license.