I have installed a 2016 exchange server next to my 2010 server. I am trying to start moving mail boxes. I am able to create a new mailbox on the new server but I cannot move a mailbox. Even one with 3 or 4 emails in it. I get the following error below. I went through and changed the registry to disable the health check but that didnt seem to help. I created a new unlimited policy and assigned it to the administrator account I was using to migrate the mailbox and still no luck.
Relinquishing job because of large delays due to unfavorable server health or budget limitations with a request throttling state ‘StalledDueToHigherPriorityJobs’