Exchange Online and Microsoft.Exchange.Data.SharingPolicyAction is invalid error on Get-MailboxFolderPermission

Hello,

Recently we got an issue on Exchagne Online, for one mailbox (yes 1! :)) we were not able to properly read permissions, the error was:

•	WARNING: An unexpected error has occurred and a Watson dump is being generated: Value specified for a parameter of type <span id="mce_SELREST_start" style="overflow:hidden;line-height:0;"></span>Microsoft.Exchange.Data.SharingPolicyAction is invalid<span id="mce_SELREST_end" style="overflow:hidden;line-height:0;"></span>: 0.
•	Parameter name: allowedActions
•	Value specified for a parameter of type Microsoft.Exchange.Data.SharingPolicyAction is invalid: 0.
•	Parameter name: allowedActions
•	    + CategoryInfo          : NotSpecified: (:) [Get-MailboxFolderPermission], EnumOutOfRangeException
•	    + FullyQualifiedErrorId : Microsoft.Exchange.ExchangeSystem.EnumOutOfRangeException,Microsoft.Exchange.Management.StoreTasks.GetMailboxFolderPermission
•	    + PSComputerName        : ps.outlook.com

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After contacting Microsoft they suggested running following command:

Get-SharingPolicy | Set-SharingPolicy -Domains Anonymous:CalendarSharingFreeBusySimple,*:CalendarSharingFreeBusyDetail

After running the above command we were able to properly rad permissions. More details about sharing policies can be found here.

 

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Veeam Backup for Microsoft Office 365 and “Failed to synchronize item changes. The server cannot service this request right now. Try again later.” error.

Recently I’ve been struggling with a few issues on Veeam Backup for Microsoft Office 365, still struggling with one, but fortunately can post an update about two that has been resolved. Jupi!

 

Okay, so I got this error going on on Veeam:

30.10.2017 07:21:17 :: Job started at 30.10.2017 08:21:17
30.10.2017 07:21:17 :: Connected to organization
30.10.2017 07:21:20 :: Found 1 mailboxes
30.10.2017 07:21:20 :: Processing mailbox <mailbox_name>@<domain_name.com> failed with error: Failed to synchronize item changes. The server cannot service this request right now. Try again later. :: 0:21:22
30.10.2017 07:42:43 :: Processing of all mailboxes failed
30.10.2017 07:42:43 :: Job failed at 30.10.2017 08:42:43

 

Backup of one single mailbox was constantly failing.

What appeared was mailbox was over 100GB in size When running Get-MailboxStatistics against it – do not know how it is possible though as O365 gives you 100GB for the mailbox.

After enabling archive for this mailbox and runnig Start-ManagedFolderAssistant so the main mailbox went down below 100GB – the backup went just fine ^^.