Category Archives: Computing

DPM and the 100 failed file limit

Regular readers and viewers will know that I use Microsoft’s Data Protection Manager (DPM) a lot, and I’m a fan of the product, despite some serious issues with recent updates (see other DPM posts for the details)… One thing that I never could never get my head around, though, is the fact that if you’re […]

Exchange Online Migration Error

Had a strange one at work this week when trying to migrate a user from our on-premises Exchange environment to Exchange Online. After starting a migration batch for a specific user, the following error message was reported almost immediately and the migration batch went into a state of permanent failure: Error: MigrationPermanentException: Couldn‎’t load the […]

Exchange OU picker

It came to my attention recently that in one of the Exchange 2013 environments I look after, when creating a new object (whether that’s a mailbox, distribution group or anything else) that requires you to choose an Organizational Unit (OU) for the new object to sit in, the following screen was appearing instead of the […]

ADFS: Finding when users were synced

ADFS – Active Directory Federation Services – is a great technology that allows you to synchronise your on-premises Active Directory environment with an Office365 tenancy. Unfortunately it can sometimes be a little impenetrable in terms of querying when changes to objects are replicated to O365. While you can search for objects using the Metaverse Search […]

Microsoft Bob: Really that bad?

DPM2016 CU4 Fix

I’ve noted in other recent posts on DPM that we have been experiencing issues with the latest release of Data Protection Manager 2016 CU4. The main issue has been that when the overnight maintenance jobs run to remove expired replicas from storage, the job causes a service crash when trying to remove some disk/volume backups. […]

Pruning DPM Replicas

There are times when, as a DPM administrator, you might want to prune disk-based replicas of data sources, either to save space or because of another reason entirely. As we’re currently experiencing an issue with DPM 2016 CU4 whereby replicas of filesystem data (disks/volumes/directories/shares) aren’t being pruned (the maintenance task calls a SQL procedure with […]

Off-boarding Exchange Online users who have never had an on-prem mailbox

Wow. Sorry for the long title on this one folks, but allow me to continue. As regular readers of my occasional tech-tips posts will know, our organisation exists in a hybrid relationship with Exchange Online. Some users are in the cloud, some are on-premises as we migrate them. Occasionally a user will need to be […]

Large DPM databases

Had an on-going issue recently where one of our DPM servers seems to crash over night. Eventually I found an error in the log stating that the DPM server had lost connectivity to the DPMDB database in the SQL instance. I thought this was a little odd because we have three DPM servers which all […]

Exchange 2013 > Exchange 2007 mail relay issues

Had an interesting issue come to light in our Exchange environment recently. Before I go into it, I’ll give a bit of background on how we’re set up… Most of our organisation has mailboxes in an Exchange 2007 environment. There are some users and shared mailboxes in Exchange 2013, and this environment is in a […]