How can I resolve it? I have this issue when my users want to create teams meetings from outlook

thanks for your response

I try it on Exchange server but the issue still exists

Thanks for your response

But the issue still exists

Hi @Elmar Babayev,

Unfortunately, the issue still persists. Here are a few more advanced steps you can try to troubleshoot invalid named attribute errors on your Exchange server:

1. If too many named attributes are created in a mailbox, named attribute exhaustion can occur. You can check for this using the following steps:

• Check named attribute usage:

Get-MailboxStatistics -Identity <User> | Select-Object DisplayName,ItemCount,DeletedItemCount,TotalItemSize

This command will give you an overview of mailbox statistics.

• Download and use the MFCMAPI tool to check the mailbox and identify any excessive named attributes. This tool allows you to view and manage properties for a mailbox.

2. Moving the mailbox to a new database can sometimes resolve issues with named properties:

• Create a new mailbox database:

New-MailboxDatabase -Name "NewDatabase" -EdbFilePath "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\NewDatabase\NewDatabase.edb" -LogFolderPath "C:\Program Files\Microsoft\Exchange Server\V15\Mailbox\NewDatabase"

• Move the mailbox:

New-MoveRequest -Identity <User> -TargetDatabase "NewDatabase"

3. If the problem is with a specific attribute, you may need to use ADSI Edit to clean up the offending attribute. NOTE: Using ADSI Edit incorrectly can cause serious problems, so proceed with caution.

• Open ADSI Edit and connect to the Configuration container.
• Navigate to:

CN=Configuration,DC=domain,DC=com

CN=Services

CN=Microsoft Exchange

CN=YourOrganization

CN=Administrative Groups

CN=Exchange Administrative Group (FYDIBOHF23SPDLT)

CN=Servers

CN=YourServer

• Locate and delete the problematic attribute.

Please feel free to contact me for any updates. And if this helps, don't forget to mark it as an answer.

Best,

Jake Zhang

I created new database, moved mailbox that have this issue to new database

but I still got error below

PS C:\Windows\system32> Get-MailboxFolderStatistics -Identity <User> -FolderScope Calendar WARNING: An unexpected error has occurred and a Watson dump is being generated: Invalid named property: [{00020329-0000-0000-c000-000000000046}:'MailboxGuid'] GuidName_MailboxGuid. Get-MailboxFolderStatistics : Invalid named property: [{00020329-0000-0000-c000-000000000046}:'MailboxGuid'] GuidName_MailboxGuid. At line:1 char:1 + Get-MailboxFolderStatistics -Identity <User> -FolderScope Calend ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~    + CategoryInfo          : NotSpecified: (:) [Get-MailboxFolderStatistics], StoragePermanentException    + FullyQualifiedErrorId : Microsoft.Exchange.Data.Storage.StoragePermanentException,Microsoft.Exchange.Management.Tasks.GetMailboxFolderStatistics