System-wide Mailbox Quotas vs Individual Mailbox Quotas
Unity Connection we have edited system-wide default mailbox quota setting (lower than default) and when new users are added they inherit the edited quota's. We have one user that has their individual mailbox quota set to the default system-wide mailbox quota.
Does the system-wide mailbox quota (set lower than default) override the individual mailbox quota that is set to Unity default or does the individual mailbox quota override the system-wide mailbox quota?
I have attached the system-wide quota and individual quota.
By default, Unity Connection is configured with the system-wide mailbox size quotas listed in Table 9-1. However, to handle the varying needs of users in your organization, you can override the system-wide quotas for individual mailboxes and for user templates.
To add onto what @Nithin Eluvathingal said, for all of the Collaboration applications the systems will apply any system-wide defaults, then they will apply any group-type settings which would override the system-wide defaults, then they will apply object-specific settings which would override any other inherited settings.