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Veeam Backup for Microsoft 365 calculator

Make use of the official Veeam Backup for Microsoft 365 calculator at

The sizer uses the principles of this best practice guide to calculate storage and compute sizing.

Object-based Sizing

Sizing the VB365 compute infrastructure is based on the amount of objects which need to be processed in the backup. The following list shows what counts as an object for Veeam Backup for Microsoft 365:

For Exchange Online and On-Premises

  • Primary Mailbox
  • Archive Mailbox
  • Shared Mailboxes
  • Public MailFolders
  • Exchange Resources (Room, Equipment)

For SharePoint Online and On-Premises

  • Sites (Collaboration, Communication, Publishing, Enterprise, Template based) including subsites
  • Personal Sites
  • Teams Sites

For OneDrive for Business Online and On-Premises

  • OneDrive accounts

For Teams

  • Teams


Use case: Organization with 500 users might need to protect all mailboxes (Primary and Archive) 200 Shared Mailboxes, 10 Public MailFolders, all Personal Sites and OneDrives along with 1000 SharePoint sites and 100 Teams. The total number of objects amounts to 3,410 objects as per table below:

Value Type
500 Primary Mailboxes
500 Archive Mailboxes
200 Shared Mailboxes
10 Public MailFolders
500 Personal Sites
500 OneDrive for Business
1000 SharePoint Sites
100 Teams (Count as 2 objects, because of complexity)

The example can be backed up by a single All-in-one Veeam Backup for Microsoft 365 server running all roles together on a server based on the recommended configuration maximums of 8 Cores and 32GB RAM.

Teams Data

Microsoft Teams as a service itself does only hold relatively low amounts of data. Most of the data is distributed on other Microsoft 365 services like Exchange, SharePoint and OneDrive for Business.

Thus for calculating your required backup space for Teams please refer to the respective sections for disk repos or object storage repositories.

To save repository space and processing time backup your Teams to the same repository as the Teams SharePoint sites.

The files stored within Microsoft Teams are stored in the respective Teams SharePoint site in subfolders based on the channel names (like General). When you run a Teams backup job only these subfolders with a link to the Team will be backed up. When running a SharePoint job on the site it will backup all the data within the SharePoint, including these Teams related folders. As the object-IDs are the same from the Teams or the SharePoint job backing these up to the same repository will “deduplicate” them and thus generate the mentioned savings.

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Page last modified: 2022-09-27.