We are in the process of migrating from legacy AIP Labels to the new Unified Labels for data classification in Office365. In the past, users were required to label all new documents by AIP policy setting. However, we did not require users to label every email by taking advantage of the "DisableMandatoryInOutlook" advanced label policy.
As we migrate to Unified Labels and set the policy to enforce mandatory labels, we see that users are required to label every email, which is undesirable in our organization. It's not a surprise that Unified Labels are ignoring the DisableMandatoryInOutlook advanced AIP label policy, but we would like to know if there is an equivalent means in Unified Labels to not require users to label every email but still require them to label documents.