Microsoft Exchange Online hosted for Office 365 Backup

• This article is for Windows only

Carbonite Safe Server Backup (CSSB) supports backup of Exchange Online hosted by Office 365. CSSB supports Full and Incremental backups of Exchange Online. Differential backups are not supported. An Exchange Online hosted by Office 365 backup allows users to select one or more mailboxes from an Exchange Online server for backup and restore, including an individual mailbox. Exchange Online is part of Microsoft Office 365.

To configure Exchange Online backups, create a new backup set and choose Exchange Online hosted by Office 365 from the list of backup types. An Exchange Online hosted by Office 365 backup is the only way to back up and restore Exchange Online with CSSB. The Exchange Database and Exchange Local Mailbox backup types cannot access Exchange Online.

Exchange Online hosted by Office 365 backups have the following properties:

• Once user credentials are supplied, CSSB will automatically discover and display all available mailboxes.
• Users may select all mailboxes or individual mailboxes for backup and restore.
• Emails, Calendars, Contacts, Contact Groups, and Tasks will be backed up.
  • Attendees and attachments are not included in Calendar backups.
• Items in the Junk folder will not be backed up.
• Items in Resource mailboxes will not be backed up.
• Items in Equipment mailboxes will not be backed up.
• Items in Public Contact Groups will not be backed up.
• New mailboxes will be automatically added to the next full backup if all mailboxes are selected. New Mailboxes will not appear in incremental backups until the full backup is complete.
• Mailboxes that are removed from Exchange will be automatically removed from the backup if all mailboxes are selected.
• Mailboxes are not automatically added or removed from the backup if individual mailboxes are selected.

Requirements for Backing Up Microsoft Exchange Online hosted by Office 365

The following requirements must be met for Exchange Online backups to function:

• Exchange Online Mailbox backups are not supported on Windows Server 2003, Windows XP, or Windows Vista.
• An administrator account must be specified within CSSB. This user must have the Global Administrator role and a valid mailbox license/emailid. The username must be in the UPN (User Principal Name) or email format, such as UserName@Domain.
  • As examples, both Admin@company.com and username@company.onmicrosoft.com are in the correct format.
• The Exchange Impersonation right must be granted to this administrator account. CSSB will attempt to add the Impersonation right automatically.
  • This right can be granted to an account from the Admin page in the Office 365 portal.
• The Exchange Discovery Management role must be granted to this administrator account.
  • This role can be granted to an account from the Admin page in the Office 365 portal.
• CSSB uses Exchange Autodiscovery to detect and connect to the Exchange server. The Autodiscovery connection attempt is made based on the administrator account provided.
  • If Autodiscovery fails, CSSB cannot connect to Exchange Online.
  • Microsoft provides a free tool to test Autodiscovery at https://testconnectivity.microsoft.com.
  • It is not necessary to pass a specific test. CSSB is able to connect to Exchange Online using the URL, DNS SRV redirect, and HTTP redirect methods.
• If using modern authentication, Azure will need to be manually configured with the proper credentials and IDs to be inserted into CSSB. Please follow the process outlined here.
• Exchange Online Mailbox Backup Sets have a limit of 74 mailboxes. If you have more than this, it will be required to split the mailboxes into separate backup sets so the total number in each set is less than 75. If 75 or more mailboxes are selected for backup, the backup will fail with "too many mailboxes could not be backed up"