Recently while crafting an article to describe the migration process to Modern Public Folders I ran into some strange errors. They both occurred while the migration batch was attempting to copy data.
Here is the first.
Error: MigrationPermanentException: Request was quarantined because of the following error: Nullable object must have a value.
Cryptic huh? Nothing much on the interwebs either.
When I attempted to resume the batch I then received this error.
Error: MigrationPermanentException: Downlevel clients aren't supported. --> Downlevel clients aren't supported.
This one got me thinking. I suddenly wondered if I had ever upgraded Exchange 2016 in my lab from preview to RTM. A quick check of the build numbers revealed I had not. D’oh!
If you get this error make sure you are not still on the preview of 2016. In addition, once you upgrade and reboot your 2016 lab server, you will need to delete and recreate the batch. Then you should be able to test the migration process successfully.
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