Active Directory is unavailable

[karsten123]

hi,
got this error for several customers right now.

Failed to access mailbox. Active Directory is unavailable.

is it something global or should i open a Veeam support case.

the particular mailbox is a M365 group without connected to Teams.

[Polina]

Hi Karsten,

Please open a support case and post its ID here for the followup.

[karsten123]

i did activate EWS for the organization as per kb4820.
tonight the job was successful.
other customers, where i did nothing, were suddenly successful too.
strange

is it recommended to activate EWS per kb4820 as a general preventative procedure?

[Matt.Sharpe]

We are also seeing this error randomly on our tenant jobs. Do we know the root cause of the intermittencies? I can assume its Microsoft side, but any validation on the actual change?

[Michael Funke]

We see the same error during Cohesity M365 backup, seems to be something on the MS side.

[NB85]

Same for us, getting the error on several customers and opened a case with Veeam support.

[lmendel]

We had only 1 tenant affected so far. Re registering the Org/Enterprise App/by running through 'Edit Organization' fixed the issue for now.

[mjr.epicfail]

I've seen it too, but as far as I can see its transient.

[LukasK]

We’ve also been receiving support requests from our partners about this over the past few days. Is it worth opening a support ticket for this?

[aeph]

Seeing the same issue on some of our tenants. Also seeing this errors since a few days:
- Failed to synchronize folder XXX
- Failed to access mailbox

The errors seem to be temporary, but retries take a very long time to resolve the issue and sometimes still fail.

Any ideas how to handle this? How is VDC handling this?