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In order for Office 365 to properly be backed up by OffsiteDataSync, the administrative account that is used for backups must have the following permissions on all mailboxes in the organization:

  • Organizations Management role – to manage role assignments
  • Application Impersonation role
  • View-Only Configuration role – to obtain the necessary organization configuration parameters
  • View-Only Recipients role – to view the list of mailbox recipients (required for job creation)

The quickest method for making sure the roles are set correctly:

1. Open up Powershell on a local Windows machine

2. Allow the execution of unsigned code (note:  this only applies to the current Powershell session)

Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass

3. Download the “Connect to Office” script from:

https://gallery.technet.microsoft.com/office/Connect-To-Office-365-9b235018

4. Execute the “Connect to Office” script – you will be prompted for Administrator credentials

./Connect-To-Office365.ps1

5. Enable customization of organization

Enable-OrganizationCustomization

6. Give the admin account the required permissions – make sure you replace “ADMIN@DOMAIN.COM” with the login you want to give permissions to

New-ManagementRoleAssignment -name:ApplicationImpersonation -Role:ApplicationImpersonation -User:ADMIN@DOMAIN.COM