o365 mailbox backup fail | Object ref. not set to...

[Symbiot78]

I upgraded my license (more licenses added).. then after that I am seeing a lot of the below errors. Not ALL users.. but many.

Processing mailbox username@domain.com failed with error: Object reference not set to an instance of an object. :: 0:01:26


What could've happened and how do I fix it?

I am running 6.0.0.385

[Mike Resseler]

Hi Symbiot,

It seems weird to me that upgrading licenses give you this error.

Please note that we already have newer versions (see here: https://www.veeam.com/kb4106)

But if you cannot upgrade yet, please create a support call. Object reference not set to... is one of these errors which can mean a lot of things so the engineers will have to dive into the logs.

Please let us know the support case # and resolution here after that

[Symbiot78]

I agree. .. it seems rather weird.. but can be a coincidence.

if I check for updates in the backup console it says I am up to date.

I will try to download the newer versions and see if it helps.. will revert back here.

[Symbiot78]

case no: 05583236

[Regnor]

Did you by any chance change the domain membership of your VB365 server? I've once had this case and the errors appeared after a while when new users were added to the backup jobs

[Symbiot78]

@regnor - no i didn't .. but good thought.


The solution was ... or is:

re-authenticate everything against o365

run full sync on each job using:

Get-VBOJob -Name "Whatever the name of your job is" | Start-VBOJob -RunAsync -Full