Category Archives: Exchange

Fixing the "ExchangeGuid is mandatory on UserMailbox" issue

During a recent Office 365 migration project I ran into an issue on the on-premises Exchange 2013 platform, when trying to create Mail User objects for the migrated mailboxes. The following error appeared when adding a new Mail User: ExchangeGuid is mandatory on UserMailbox. Database is mandatory on UserMailbox. After first verifying that the Exchange… Read More »

Resolving Exchange Assistants "TransientMailboxException" error, Event ID 9041

I recently encountered a mail flow problem in an Exchange 2016 environment, that was being caused by the DNS configuration on the Exchange server’s network interface. The Application log of the Exchange server was flooded by event ID 9041: Log Name: Application Source: MSExchange Assistants Date: 10/6/2016 4:56:46 PM Event ID: 9041 Task Category: Assistants… Read More »

Cumulative Updates released for Exchange 2016 and Exchange 2013

Microsoft has just released the Exchange Server 2013 Cumulative Update 13 and the Exchange Server 2016 Cumulative Update 2. These updates include both normal fixes to customer reported issues and updated functionality. Added functionality and fixes: .Net 4.6.1 Support AutoReseed Support for BitLocker SHA-2 Support for Self-Signed Certificates Migration to Modern Public Folder Resolved (KB3161916)… Read More »

Reference to msExchRecipientDisplayType, msExchRecipientTypeDetails and msExchRemoteRecipientType values

Integrating an on-premise Active Directory and Exchange organization with Microsoft Cloud Services will require attention to new elements and details. As an example the list of object attributes in the on-premises Active Directory schema differs from the attributes in the Azure and Office 365 services directory platforms. An example is three critical values that are… Read More »

Cumulative Update 10 for Exchange Server 2013 released

The Cumulative Update 10 for Microsoft Exchange Server 2013 and the Exchange Server 2010 Service Pack 3 Update Rollup 11 has just been released. Both releases includes a range of fixes for customer reported issues, minor product enhancements and previously released security bulletins. Cumulative Update 10 for Exchange Server 2013 The CU10 package contains the… Read More »