Modify All Data Permission in Salesforce

The 'Modify All Data' permission does affect all of the following areas: 

Data Tasks

• Full Access on all objects (Ignores sharing and any other security)
• Ability to unlock records in a workflow approval process
• Access to the mass delete page in setup
• Ability to edit divisions and mass transfer objects between divisions
• Allow the user to edit shares on objects not owned by them
• Can import Person Accounts and Contacts
• Has access to mass update addresses
• Can delete a pending import
• Can import solutions even without the Import Solutions permission
• Can change document owner
• Can edit opportunity line item unit price
• Can edit existing case comments
• Required for deleting case comments
• Allows editing/deleting of private contacts owned by someone else
• Allows editing all forecasts
• Can access mass mails

Administrative Tasks

• Access to the "empty all org" button in recycle bin
• Can export an org to sandbox
• Shows the Data Loader link in setup (but not required to use the Data Loader!!!!)
• Can enable Salesforce 2 Salesforce
• There must be at least one active user with Modify All Data in an org
• Modify All Data is needed to delete *all* custom reports for an object
• Can set an org's default density preference, regardless of that user’s access to Lightning Experience

Developer Tasks

• Access to the Metadata API for a developer
• Access to the outbound and workflow outbound messaging queues
• Author Apex requires Modify All Data - so to write Apex, you first must have Modify All Data

 
User Management Tasks

• Can edit anyone's quota
• Can edit sales teams on other users accounts
• Can Login as another user once granted access
• Without Modify All Data, you cannot assign a user to a profile that has Modify All Data

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Permissions 'Modify All Data' Requirements

These permissions will be automatically enabled when you enable 'Modify All Data'; conversely, 'Modify All Data' will be disabled if any of the following permissions are disabled:

• Read, Create, Edit, Delete, View All Records, Modify All Records on all standard and custom objects
• Convert Leads
• Create and Customize Reports
• Edit Events
• Edit Personal Quota
• Edit Tasks
• Import Leads
• Import Solutions
• Manage Categories
• Manage Dashboards
• Manage Public Documents
• Manage Public List Views
• Manage Public Reports
• Manage Public Templates
• Override Forecasts
• Run Reports
• Transfer Leads
• Transfer Record
• Use Team Reassignment Wizards
• View All Data
• View All Forecasts
• View Setup and Configuration

Notes:

• Enabling 'Modify All Data' as a system permission will change all objects to have Modify All Records/View All Records permission.
• Disabling the 'Modify All Data' system permission does not automatically remove the Modify All Records/View All Records permission on the objects. This must be done manually.
• Remember that Salesforce has two profile interfaces. Depending on which profile user interface is enabled in your organization, you can:
  • View and edit profiles in the enhanced profile user interface
  • View and edit profiles in the original profile user interface