New Mailbox backup Issue?

[shawnperez]

Started getting new error last night.

Processing mailbox *** failed with error: Unable to process the Exchange Web Services item.. Invalid serialized stream, unknown opcode found: 4

Started with one mailbox then moved to 2 boxes and has stayed that way for every backup since.

Only happening on one of the many installs we manage.

Wondering if Microsoft added another unknown object type...

[ReKe]

See exactly the same issue here. Case-Id 07082316

[bielekovve]

same here... I will open a case tomorrow...

[chrisflyckelen]

See exactly the same issue in different organizations. Case #07082421

[greghillard]

I am also seeing the same issue since this morning, case no. 07081770. It is getting worse, started with 2 mailboxes failing and the latest run has 14 failures.

[shawnperez]

Good to know I am not alone. At this point I will just let the existing tickets work on the issue instead of adding to the problem.

For reference it has now jumped to 4 mailboxes at the one client and I am on the latest build From December.

[Mike Resseler]

Thanks for letting us know gentleman. At this point in time I don't see anything in my own environments, but we will get more information quickly I think once QA have checked all of their environments

[kberg]

This occured in our environment as well.
Everything went fine yesterday, today I got a warning mail with this error.
7 mailboxed are affected, all of the other mailboxes are fine as well as OneDrive & Web-elements.

[OashaP]

Same here. I just opened a ticket in hope to give support another perspective on this topic.
Case ID is #07082747

[karsten123]

we have these errors for several customers as well.
case #07082883
thanks!

[bielekovve]

Case #07082918 — Error Exchange backup

[itops-shltm]

By us also, starting as of 09.01

[bielekovve]

...after running some mailbox backups again I noticed that the error has gone away. Maybe Microsoft has recalled some changes? Backup is now running fine without errors... Anyone else noticed that?

[mjr.epicfail]

yeah same here, got several tenants with this issue, even 5 retries with 5 minute interval kept failing.
Just retried, all is well.

[Bernie]

The same here.
SOLVED: installed powershell 5.1 in order to update veeam for office 365 to 7.0.0.4388 version

[ReKe]

Looks like it is working again, but the first run was much longer and backsup much more data then expected. Let us see how it works in the next few days.

[Mike Resseler]

All,

As some of you are already aware. Tests on our side where we see it indeed shows that a retry will fix the issue. Our support team should be contacting everyone with a case now (but we have already a lot of these cases) and ask to test a retry. It seems to be solving the issue. For now, we have no response from MSFT on the topic though.

[greghillard]

I also see mailbox backups working again. All of the backups beginning at 8:45 PM PST last night have worked successfully for us.

[karsten123]

back to normal again for us. wtf.
waiting for the official statement from MSFT.

[kavaa]

Weird just started to get this issue today, running on the latest Update...

[sascha.miloradovic]

Issue happened first time over night across multiple tenants and mailboxes. I have just opened a case 07096171.

[federico.masarie]

Same issue... across multiple tenants, veeam servers and mailboxes.
Two days ago we had (for the first time) this issue with a single customer backup job.
This night the problem recurred on other multiple backup jobs from other customers (but no longer on the first one...).
Our open case: #07096258

[ACrispiels]

Same error for me since this morning.

[Mildur]

Hi Federico, Hi Alain

Last time, a job retry automatically solved the issue in all cases.
Can you please confirm a retry didn't solved the problem?

Best,
Fabian

[federico.masarie]

Hi Fabian,
I've just tried again, but nothing.... The issue seems to persist (on multiple different jobs, but only on some mailboxes, not all).

Best Regards,
Federico

[MaartenA]

A retry is not helping this time on my side.

[tvveen]

Same issue here since last night for 4 of our 50 tenants
Case #07096343

[Mike Resseler]

I'm passing it to the QA teams for review, it might be the same issue, and maybe we are a bit fast with retries this time. But we will research

[aurinkovoodoo]

Seeing this issue on our side as well as of this morning. Tried to run the job again, but fails on half of the mailboxes.
Case #07096366

[ylo]

Hi, we have the same issue this morning for one organization.
Case #07096440

Regards,
Yann