Public Folder Backup required permission

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Public Folder Backup required permission

Veeam Logoby agrob » Thu Aug 02, 2018 8:16 am

Good Day

VBO365 V2, Exchange Online (all Mailboxes and Public Folder). I can backup all User mailboxes.
I can also see the Root Public Folder Mailbox but backup is not able to protector the Public Folder. The error i get:

Processing mailbox PF-MBX-Root_58e125fa@xxxxxxxx.onmicrosoft.com failed with error: Failed to synchronize item changes in folder: FOLDERNAME.. Access is denied. Check credentials and try again., ICS synchronization failed. :

-> Does the account need ab mailbox (mail enabled) which is used for Backup to protect Public Folder Date? If not, any other special permissions beside the one described in the manual?

Thanks
agrob
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Re: Public Folder Backup required permission

Veeam Logoby Polina » Thu Aug 02, 2018 8:38 am

Hi Andre,

All the required permissions are covered in the user guide.
Can you check if this specific folder from the error message has any custom access rights? And also ensure that this folder is located under IPM_SUBTREE (if not, it cannot be processed).
Polina
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Re: Public Folder Backup required permission

Veeam Logoby agrob » Thu Aug 02, 2018 8:57 am

Hi Polina
Thanks for your answer. Public Folder is located under the IPM_SUBTREE. But we have different permissions set on different Publicfolders. So not all User have access on all PublicFolder
-> I Guess in that case i have to assign at least reader rights to the account which is backing up the PF database right? In that case, i need to mail enalbe this user to grant the required permissions because without Mailbox, i cant set permission for this user on the public folder.

Regards
agrob
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Re: Public Folder Backup required permission

Veeam Logoby Polina » Thu Aug 02, 2018 9:09 am

Right, give VBO at least Reviewer access to this folder.
Thanks!
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Re: Public Folder Backup required permission

Veeam Logoby agrob » Fri Aug 03, 2018 7:30 am

configured reviewer rights for all public folders for the backup account. still get an "access denied" message.
if i configure outlook with the backup account, i can access and browse all public folder successfully. also the "access denied" message is not always reported on the same folder... i have opened a case
agrob
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Re: Public Folder Backup required permission

Veeam Logoby Polina » Fri Aug 03, 2018 10:03 am

Thanks for letting me know, Andre. And please post your case ID here, so that I could track the investigation.
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Re: Public Folder Backup required permission

Veeam Logoby agrob » Fri Aug 03, 2018 10:41 am

Sure, the Case ID is 03131049
Thanks
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Re: Public Folder Backup required permission

Veeam Logoby agrob » Mon Aug 06, 2018 2:36 pm

Solution:
Veeam Uses inpersonation, so in fact the default "user" is issued to access PF Data. Because Default has not required rights, impersonation needs to be disabled.

1. Stop Veeam Backup for O365 Services
2. Edit proxy.xml file located in c:\programdata\veeam\backup365
3. Add the following line under <Archiver>
<Source EwsImpersonatePublics="False" />
4. Restart Veeam Backup for O365 Services

Now the backup should run successful.
(Note: User configured for Backup in Veeam O365 needs reviewer rights on all Public folders)

Many Thanks to Veeam Support for solving this!

Best Regards
agrob
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Re: Public Folder Backup required permission

Veeam Logoby Mike Resseler » Tue Aug 07, 2018 5:05 am

Andre,

Thanks for coming back to us with the solution! I am sure others will benefit from this also. I will also put this up as a candidate for a KB!
Mike Resseler
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Re: Public Folder Backup required permission

Veeam Logoby final » Sun Aug 12, 2018 9:44 am

Note that EwsImpersonatePublics is only available in v2. However, Veeam has a patch for 1.5 which provides this funcionality. I was given this patch about 8 months ago when I had the same problem.
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Re: Public Folder Backup required permission

Veeam Logoby Mike Resseler » Mon Aug 13, 2018 5:04 am

Final,

Thanks also for this! Again something which can help other people here on the forums!
Good stuff
M/
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