MigrationPermanentException: Cannot find a recipient that has a mailbox GUID

Ran into the following error while attempting to offboard a mailbox (migrate it back on prem from Exchange Online): MigrationPermanentException: Cannot find a recipient that has mailbox GUID 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx' This error is usually caused when a mailbox is created directly in the cloud (New - Office 365 Mailbox in Exchange console on prem). The Exchange … Continue reading MigrationPermanentException: Cannot find a recipient that has a mailbox GUID

Exchange Online Hybrid: Fixing free/busy issues

Now, I'm just going to come out and say it - this is NOT the only fix for free/busy issues when configuring Exchange Online Hybrid with an on-prem Exchange server. If you're reading this, then it's more than likely that you (like me), have been reading countless TechNet articles, blog posts, forum posts, etc. Well, … Continue reading Exchange Online Hybrid: Fixing free/busy issues

Unable to change Deleted Item Retention

I recently needed to update the Deleted Item Retention period in Office 365 from the default 14 days to the maximum allowed (30 days) for all mailboxes in my environment. Since I was migrating mailboxes to Office 365 at the time, I wrote a script that I could add to my process which would update … Continue reading Unable to change Deleted Item Retention

Restoring Outlook Categories

Similar to Autocomplete settings, Outlook Categories are saved in a Stream_CategoryList_1_guid.dat file. The GUID is random, and looks something like this: In order to restore Outlook Categories when creating a new profile, you can use the same approach required for restoring Autocomplete files. Basically, rename the old categories .dat file to match the DAT file … Continue reading Restoring Outlook Categories

Distribution Groups, Naming Policies and You!

Office 365 Groups: Next Gen Distribution Lists? Lately Microsoft has been putting a lot of focus on Office 365 groups as an ad hoc, user driven collaboration platform. These Office 365 Groups are also used for Microsoft Planner, as each Office 365 Group creates a plan, and every time a user creates a new plan … Continue reading Distribution Groups, Naming Policies and You!

On Premise attributes not updating properly

I've run into this problem a few times during recent migrations, so I've started incorporating the script blocks below into my migration scripts to make sure that I have a consistent experience with moving shared mailboxes, and enabling archive mailboxes. Issue: Sometimes msExchange attributes are not properly updated when a mailbox is moved in Exchange. … Continue reading On Premise attributes not updating properly

Delegated Access & Sent items

Keeping sent items in the correct mailbox is a common problem for Exchange users who have delegated access to a shared mailbox, or even Send As permissions on another user's mailbox. Thankfully, there is a solution to this problem, and it works the same whether your Exchange is on premise, or in Office 365. The … Continue reading Delegated Access & Sent items