Measure-VBOOrganizationFullBackupSize: The operation has timed out


Sometimes timeouts can happen during the measurement of an O365 organization by using the Measure-VBOOrganizationFullBackupSize cmdlet within Veeam Backup for Office 365.

This often happens, when you are measuring against big organizations with a lot of data in it. Other observations I had was, when the WAN uplink was poor. However, you may run into this error message.


In general, this PowerShell cmdlet is a very effective way as a basis on sizing your Veeam Backup for Office 365 infrastructure. I use it for almost all of my sizings because it is so simple.

An example of measuring that VBO Organization is online at the blog of Jorge de la Cruz How to obtain the full size of an Office 365 organization that you want to protect with Veeam

So when you encounter the above error, you are able to adjust the timeout within Veeam Backup for Office 365 config files.


First of all make sure, that no jobs are running ! This is very important !

After you checked, that no job is running, you need to stop the Veeam Backup for Office 365 services.


Really make sure, that the services are not running, while you proceed.

vbo services not running

Next, we need to edit two “Config.xml” files which are located here:

  • %localappdata%/Veeam/Backup365/Config.xml
  • %programdata%/Veeam/Backup365/Config.xml

The folder structure should look something like this:

edit config xml

Adjusting the Config.xml to prepare for new measure

Finally, to increase the timeout value, you need to add a parameter called

<RemoteConnection Timeout="2:00:00" />

between the “Archive nodes”. Whereby “2:00:00” means 2 hours. Set this to your appropriate value.

Here is the example, on how it should look like afterwards:

final config xml

Finally, simply restart your Veeam Backup for Office 365 services again and retry the measurement cmdlet with Measure-VBOOrganizationFullBackupSize.

Retry Measure-VBOOrganizationFullBackup

Here is an example, where I measured at a customer with a lot of OneDrive data. The process took roughly about 11 hours to finish, but It did 🙂


I hope this helps in terms you encounter the error, that the operation timed out !

If you want to read more of my Veeam Backup for Office 365 posts, have a look here:


About Falko Banaszak

Falko is a Consulting Field Solutions Architect for Modern Data Protection based in Germany working at Pure Storage Inc. In the last 12 years he has built a strong focus on virtualization, BCDR and has a passion for Microsoft 365 & storage systems. He's a Veeam Vanguard, a Veeam Certified Engineer, Veeam Certified Architect and a Veeam User Group founder and leader in Germany.

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